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Blood banks will shortly start to screen all donors for NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood.
Which of the following inferences about the consequences of instituting the new tests is best supported by the passage above?
  • a)
    The incidence of new cases of NANB hepatitis is likely to go up by 10 percent.
  • b)
    Donations made by patients specifically for their own use are likely to become less frequent.
  • c)
    The demand for blood from blood banks is likely to fluctuate more strongly.
  • d)
    The blood supplies available from blood banks are likely to go down.
  • e)
    The number of prospective first-time donors is likely to go up by 5 percent.
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Blood banks will shortly start to screen all donors for NANB hepatitis...
The passage states that even with the new screening tests, about 10 percent of actual donors will still supply NANB-contaminated blood. This implies that the blood supplies available from blood banks are likely to decrease because a portion of the donors will be disqualified due to the screening tests. Therefore, option (D) is the best-supported inference based on the passage.
Let's briefly examine the other options and explain why they are not as strongly supported:
(A) The incidence of new cases of NANB hepatitis is likely to go up by 10 percent.
  • There is no information in the passage that suggests an increase in the incidence of new cases of NANB hepatitis. The passage only talks about the screening tests and their effectiveness in identifying contaminated blood, not the overall incidence of the disease.
(B) Donations made by patients specifically for their own use are likely to become less frequent.
  • The passage does not mention anything about donations made by patients specifically for their own use. It focuses on blood donors and the screening tests used to detect NANB hepatitis.
(C) The demand for blood from blood banks is likely to fluctuate more strongly.
  • There is no information in the passage to support the claim that the demand for blood from blood banks will fluctuate more strongly. The passage primarily discusses the screening tests and the potential impact on blood supplies.
(E) The number of prospective first-time donors is likely to go up by 5 percent.
  • The passage does not provide any information about an increase in the number of prospective first-time donors. It only mentions that up to 5 percent of all prospective blood donors may be disqualified due to the screening tests.
In summary, option (D) is the best-supported inference based on the passage, as it aligns with the information provided about the potential decrease in blood supplies from blood banks
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Community Answer
Blood banks will shortly start to screen all donors for NANB hepatitis...
Introduction:
The passage states that blood banks will soon start screening all donors for NANB hepatitis. While the new screening tests will disqualify up to 5 percent of prospective donors, they will still miss two-thirds of donors carrying NANB hepatitis. As a result, it is estimated that about 10 percent of actual donors will still provide NANB-contaminated blood. Based on this information, we need to infer the consequences of instituting the new tests.

Inference:
The best-supported inference about the consequences of instituting the new tests is that the blood supplies available from blood banks are likely to go down.

Explanation:
- The passage mentions that the new screening tests will disqualify up to 5 percent of prospective blood donors. This indicates that a certain percentage of potential donors will be ineligible to donate blood due to the presence of NANB hepatitis.
- Additionally, the passage also states that the new tests will still miss two-thirds of donors carrying NANB hepatitis. This means that even though the screening tests are implemented, a significant number of donors with NANB hepatitis will still be able to donate blood.
- Combining these two pieces of information, it can be inferred that the implementation of the new tests will result in a decrease in the overall blood supplies available from blood banks. This is because a portion of potential donors will be disqualified, and the screening tests will not be able to identify all donors with NANB hepatitis.
- The passage further mentions that about 10 percent of actual donors will still supply NANB-contaminated blood. This reinforces the idea that the new tests will not be completely effective in preventing the supply of contaminated blood.
- Therefore, the best-supported inference is that the blood supplies available from blood banks are likely to go down as a consequence of instituting the new tests. This conclusion is based on the fact that a percentage of potential donors will be disqualified, and the screening tests will not identify all donors with NANB hepatitis.
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The accumulation of scientific knowledge regarding the environmental impact of oil well drilling in North America has tended to lag behind the actual drilling of oil wells. Most attempts to regulate the industry have relied on hindsight: the need for regulation becomes apparent only after undesirable events occur. The problems associated with oil wells’ potential contamination of groundwater—fresh water within the earth that supplies wells and springs—provide a case in point.When commercial drilling for oil began in North America in the mid-nineteenth century, regulations reflected the industry’s concern for the purity of the wells’ oil. In 1893, for example, regulations were enacted specifying well construction requirements to protect oil and gas reserves from contamination by fresh water. Thousands of wells were drilled in such a way as to protect the oil, but no thought was given to the possibility that the groundwater itself might need protection until many drinking-water wells near the oil well sites began to produce unpotable, oil contaminated water.The reason for this contamination was that groundwater is usually found in porous and permeable geologic formations near the earth’s surface, whereas petroleum and unpotable saline water reservoirs are generally found in similar formations but at greater depths. Drilling a well creates a conduit connecting all the formations that it has penetrated. Consequently, without appropriate safeguards, wells that penetrate both groundwater and oil or saline water formations inevitably contaminate the groundwater. Initial attempts to prevent this contamination consisted of sealing off the groundwater formations with some form of protective barrier to prevent the oil flowing up the well from entering or mixing with the natural groundwater reservoir. This method, which is still in use today, initially involved using hollow trees to seal off the groundwater formations; now, however, large metal pipe casings, set in place with cement, are used.Regulations currently govern the kinds of casing and cement that can be used in these practices; however, the hazards of insufficient knowledge persist. For example, the long-term stability of this way of protecting groundwater is unknown. The protective barrier may fail due to corrosion of the casing by certain fluids flowing up the well, or because of dissolution of the cement by these fluids. The effects of groundwater bacteria, traffic vibrations, and changing groundwater chemistry are likewise unassessed. Further, there is no guarantee that wells drilled in compliance with existing regulations will not expose a need for research in additional areas: on the west coast of North America, a major disaster recently occurred because a well’s location was based on a poor understanding of the area’s subsurface geology. Because the well was drilled in a channel accessing the ocean, not only was the area’s groundwater completely contaminated, but widespread coastal contamination also occurred, prompting international concern over oil exploration and initiating further attempts to refine regulations.The passage states which one of the following about underground oil reservoirs?

The accumulation of scientific knowledge regarding the environmental impact of oil well drilling in North America has tended to lag behind the actual drilling of oil wells. Most attempts to regulate the industry have relied on hindsight: the need for regulation becomes apparent only after undesirable events occur. The problems associated with oil wells’ potential contamination of groundwater—fresh water within the earth that supplies wells and springs—provide a case in point.When commercial drilling for oil began in North America in the mid-nineteenth century, regulations reflected the industry’s concern for the purity of the wells’ oil. In 1893, for example, regulations were enacted specifying well construction requirements to protect oil and gas reserves from contamination by fresh water. Thousands of wells were drilled in such a way as to protect the oil, but no thought was given to the possibility that the groundwater itself might need protection until many drinking-water wells near the oil well sites began to produce unpotable, oil contaminated water.The reason for this contamination was that groundwater is usually found in porous and permeable geologic formations near the earth’s surface, whereas petroleum and unpotable saline water reservoirs are generally found in similar formations but at greater depths. Drilling a well creates a conduit connecting all the formations that it has penetrated. Consequently, without appropriate safeguards, wells that penetrate both groundwater and oil or saline water formations inevitably contaminate the groundwater. Initial attempts to prevent this contamination consisted of sealing off the groundwater formations with some form of protective barrier to prevent the oil flowing up the well from entering or mixing with the natural groundwater reservoir. This method, which is still in use today, initially involved using hollow trees to seal off the groundwater formations; now, however, large metal pipe casings, set in place with cement, are used.Regulations currently govern the kinds of casing and cement that can be used in these practices; however, the hazards of insufficient knowledge persist. For example, the long-term stability of this way of protecting groundwater is unknown. The protective barrier may fail due to corrosion of the casing by certain fluids flowing up the well, or because of dissolution of the cement by these fluids. The effects of groundwater bacteria, traffic vibrations, and changing groundwater chemistry are likewise unassessed. Further, there is no guarantee that wells drilled in compliance with existing regulations will not expose a need for research in additional areas: on the west coast of North America, a major disaster recently occurred because a well’s location was based on a poor understanding of the area’s subsurface geology. Because the well was drilled in a channel accessing the ocean, not only was the area’s groundwater completely contaminated, but widespread coastal contamination also occurred, prompting international concern over oil exploration and initiating further attempts to refine regulations.Which one of the following most accurately states the main point of the passage?

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Blood banks will shortly start to screen all donors for NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood.Which of the following inferences about the consequences of instituting the new tests is best supported by the passage above?a)The incidence of new cases of NANB hepatitis is likely to go up by 10 percent.b)Donations made by patients specifically for their own use are likely to become less frequent.c)The demand for blood from blood banks is likely to fluctuate more strongly.d)The blood supplies available from blood banks are likely to go down.e)The number of prospective first-time donors is likely to go up by 5 percent.Correct answer is option 'D'. Can you explain this answer?
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Blood banks will shortly start to screen all donors for NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood.Which of the following inferences about the consequences of instituting the new tests is best supported by the passage above?a)The incidence of new cases of NANB hepatitis is likely to go up by 10 percent.b)Donations made by patients specifically for their own use are likely to become less frequent.c)The demand for blood from blood banks is likely to fluctuate more strongly.d)The blood supplies available from blood banks are likely to go down.e)The number of prospective first-time donors is likely to go up by 5 percent.Correct answer is option 'D'. Can you explain this answer? for GMAT 2024 is part of GMAT preparation. The Question and answers have been prepared according to the GMAT exam syllabus. Information about Blood banks will shortly start to screen all donors for NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood.Which of the following inferences about the consequences of instituting the new tests is best supported by the passage above?a)The incidence of new cases of NANB hepatitis is likely to go up by 10 percent.b)Donations made by patients specifically for their own use are likely to become less frequent.c)The demand for blood from blood banks is likely to fluctuate more strongly.d)The blood supplies available from blood banks are likely to go down.e)The number of prospective first-time donors is likely to go up by 5 percent.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for GMAT 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Blood banks will shortly start to screen all donors for NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood.Which of the following inferences about the consequences of instituting the new tests is best supported by the passage above?a)The incidence of new cases of NANB hepatitis is likely to go up by 10 percent.b)Donations made by patients specifically for their own use are likely to become less frequent.c)The demand for blood from blood banks is likely to fluctuate more strongly.d)The blood supplies available from blood banks are likely to go down.e)The number of prospective first-time donors is likely to go up by 5 percent.Correct answer is option 'D'. Can you explain this answer?.
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