When a speaker tries to persuade, he or she is in fact trying to _____.
选项：

A:guide the audience towards forming a certain opinion, attitude, or judgement on the matter at hand
B:relate the facts and give the needed information for the audience to add to their store of knowledge
C: convince the audience that it is worthwhile to pay attention to what he has to say
D:make the audience realize that there is gap in their understanding of something that needs filling in