Which one of these questions could be most appropriately answered in a research paper, being neither too broad nor too narrow?

what have been the achievements of the american space program?

what alternative fuels offer our best prospects in the next ten years?

how do the symptoms of a heart attack differ from those of a stroke?

how many american jobs pay only the minimum wage and offer no benefits?

include a reason for why you chose a response

The answer should be C.

Explanation:

A. What have been the achievements of the American space program?

This question is too broad, containing all of the achievements of a large program.

B. What alternative fuels offer our best prospects in the next ten years?

This is also too broad, asking about the next ten years.

C. How do the symptoms of a heart attack differ from those of a stroke?

This is the answer because you are asking about a fact that many people do not know, (and might want to know) the answer to. Not too broad, nor too narrow.

D. How many American jobs pay only the minimum wage and offer no benefits?

This question asks about all of America, and that is very broad.

- Hope this helps, Good Luck.

the answer should be a)directions.