Which of the Following Statements About Choosing a Presentation Topic

Which of the following statements about choosing a presentation topic is correct?

A) Researching your topic is necessary, even if you already are familiar with the subject.
B) Brainstorming topics means to eliminate less appropriate topics from consideration.
C) The brainstorming phase of planning a presentation is usually the most time consuming.
D) Experts recommend choosing your topic before considering the time, audience, or occasion.
E) You should eliminate any topics you think your audience might already know something about.