Extemporaneous presentations are usually more effective than memorized ones

What is the difference between a speech to convince and a speech to actuate?

What will be an ideal response?

Effectively handling the question-and-answer session after a speech involves

A) interrupting audience members who ask lengthy questions. B) making up answers if the speaker isn't sure how to respond to a question. C) answering questions as briefly as possible. D) repeating the question so the audience can hear it.