The correct answer is C. prepare their thoughts in advance. It doesn't matter how big your audience is - if you've been asked to speak, then you should prepare accordingly so as not to embarrass yourself. You shouldn't get everything out quickly - take your time and give a good speech. You shouldn't imitate anyone, but rather create your own style. You don't have to use fancy vocabulary in order to impress your audience - if your speech is good, they won't care about your choice of words.
