The appeal to ethos in persuasive speaking refers to a speaker's credibility. Establishing strong ethos helps to gain the audience's trust and makes their arguments more persuasive. Thus, the correct answer is A. Credibility.
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Ethos in persuasive speaking refers to the speaker's credibility, which is essential for persuading the audience. By establishing their authority and trustworthiness, speakers can significantly influence how their arguments are received. This appeal is one of the three classical appeals in rhetoric, alongside logic and emotion. ;