Why is it important to have a research plan. It identifies the claim
It evaluates the argument
It provides secondary questions
It guides the collection of information

D!

Explanation:

It is D because a research plan is used to guide you along; it is not used to state your main claim. In fact, research plans aren't meant to be put directly into essays!

the answer would be in this answer. someone already asked the question.  

answer; genetics;