Explanation:

This question belongs to the Humanities/Arts category and requires an understanding of numerical patterns and sequences. The given options are a series of numbers: 1000, 1200, 1500, and 2000. The task is to identify the correct answer option.

To find the correct answer, we need to analyze the given series of numbers and look for a pattern or rule that governs their progression.

Analysis:

Let's examine the given series of numbers:

1. Option A: 1000
2. Option B: 1200
3. Option C: 1500
4. Option D: 2000

From a quick observation, we can see that the numbers are increasing in each option. However, there is no clear pattern or rule evident from this observation alone.

Identifying the pattern:

To identify the pattern, we need to calculate the differences between consecutive numbers in each option. Let's calculate the differences:

1. Option A: 1000 -> 1200 = 200
2. Option B: 1200 -> 1500 = 300
3. Option C: 1000 -> 1500 = 500
4. Option D: 1000 -> 2000 = 1000

Now, let's analyze the pattern in the differences:

1. Option A: 200
2. Option B: 300
3. Option C: 500
4. Option D: 1000

From this analysis, we can observe that the differences between consecutive numbers in each option are increasing. Specifically, the differences are increasing by 100 in each step.

Applying the pattern:

Now that we have identified the pattern, we can apply it to the options and determine the correct answer.

Starting from 1000, we can increase the number by 100, following the pattern:

1. Option A: 1000 -> 1100 -> 1200 (incorrect)
2. Option B: 1000 -> 1100 -> 1200 -> 1300 -> 1400 -> 1500 (incorrect)
3. Option C: 1000 -> 1100 -> 1200 -> 1300 -> 1400 -> 1500 (correct)
4. Option D: 1000 -> 1100 -> 1200 -> 1300 -> 1400 -> 1500 -> 1600 -> 1700 -> 1800 -> 1900 -> 2000 (incorrect)

Therefore, the correct answer is option C: 1000 - 1500.

Conclusion:

By analyzing the given series of numbers, calculating the differences, and identifying the pattern, we determined that the correct answer is option C: 1000 - 1500.