Which of the following is an accurate statement about the credibility of a speaker?a. A speaker will have low initial credibility if the audience knows about his or her expertise before the speech.b. A highly persuasive speaker has greater terminal credibility than initial credibility.c.Credibility is enhanced if a speaker quotes an international scholar with limited name recognition rather than a well-known local expert.d. Credibility remains unchanged throughout a speaker's speech.

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