<u>Answer:</u>
The correct answer option is c. State several central ideas in your thesis statement.
<u>Explanation:</u>
In an essay or a research paper, a sentence which covers and expresses the main idea is called as its thesis statement.
The purpose of the thesis statement is to inform the reader about that one main idea or topic that the essay or research paper is about.
So the thesis statement cannot have several central ideas in it.
I think B is your best shot here
Hmm, I believe I would start my research on the role of gender in playground behavior by D) Doing an Internet search on the most common playground problems for toddlers.
That research may describe not only the common problems, but the gender involved in each of the problems.
Hope this helps! :)