Which rhetorical appeal relies on the credibility of the speaker? a. logos b. pathos c. ethos d. tragedy

C. Ethos

Ethos appeals to ethics. Responsible research practices and fair use of appeals contribute to your credibility and appeal to our need to trust that you are a legitimate and ethical individual. Ethical appeals also tap into an audience’s character or sense of right and wrong.  

One way to remember that ethos applies to the credibility is to affiliate it with the word 'ethics'.