Answer:
D. to reduce the amount of poverty within a country
Explanation:
The first sentence the rest is supporting details
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21 - discover
22 - ancient
23 - imagination
24- information
25- historians
"A" is probably the best choice. All of your other choices are close-ended questions, and can only be answered with a simple yes or no, But "A" is an open-ended question because the answer wont be just a "yes" or "no".
Hope this helps!
I think its D, but it might also be A.
Positive it's D tho.