Question

2. _______ is a great way to broaden or narrow your search. A. Choosing a trending research topic B. Asking more questions C. Soliciting for topic ideas in the Penn Foster Community D. Asking your instructor to assign you a topic

Answer 1

I would say that B. asking more questions is a great way to broaden or narrow your search.
If you ask additional questions about the thing you are writing, then it can either broaden your search (by writing about things related to your topic) or narrow it to a single topic you want to write about.