Question

If one or more paragraphs in an essay lack adequate explanations or supporting details, you can A. revise the topic sentence so that fewer details are needed to support it. B. use a transitional phrase to link it to another paragraph that includes more details. C. delete sentences that don't support the topic sentence. D. use who, what, when, where, why, and how questions to generate the details you need

Answer 1

I believe the answer is D.  use who, what, when, where, why, and how questions to generate the details you need
The usage of 5w and 1h, will mostly cover all the information needed by the readers to understanding certain topics, so you need to make sure that all of these aspects are exist in the details or you have to do deeper information gathering for it.