____vaccination has eliminated naturally occurring polio in North and ...
The correct answer is B: Although
Explanation:
Although is the appropriate conjunction to use in this context because it indicates a contrast or contradiction between two statements. In this case, it highlights that while vaccination has eliminated naturally occurring polio in North and South America, rare cases continue to occur in developing countries of Africa.
Here's a breakdown of the options and why they are incorrect:
- A: However - This option is not the best choice because "however" is typically used to introduce a contrasting statement, but it doesn't provide a clear contrast in this context.
- C: As a result of - This option is not the best choice because it suggests that the rare cases of polio in Africa are a direct result of vaccination, which is not accurate.
- D: Hence - This option is not the best choice because "hence" indicates a consequence or result, but there is no clear cause-and-effect relationship stated in the sentence.
- E: Moreover - This option is not the best choice because "moreover" is used to add information that supports or strengthens a previous statement, but it doesn't provide a clear contrast in this context.
Therefore, the most appropriate conjunction to use in this sentence is "Although" as it effectively conveys the contrast between the elimination of polio in North and South America and the continuing rare cases in Africa.
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____vaccination has eliminated naturally occurring polio in North and ...
Although
- The word "although" is used to introduce a contrast or concession in a sentence, showing that the following information may be unexpected or contrary to what was previously stated.
- In this case, the statement "vaccination has eliminated naturally occurring polio in North and South America" is followed by the contrasting information that "rare cases continue to occur in developing countries of Africa."
- By using "although," the sentence effectively highlights the persistence of polio cases in Africa despite the success of vaccination in North and South America.