Which statement is most clearly an example of ethos

Example that most clearly uses ethos to make an appeal

A reference to the authors 15 years as a district court judge.

in the following given option, the statement stating, "people listen to my advice as a nutritionist " is the example of ethos.

Explanation:

Ethos is the figure of speech when the argument is based on the credibility of the clause or involves ethics. the option of "people listen to my advice as a nutritionist " is the statement where the people are listening to the advice of the person because of his credibility.

People listen to the advice given by the person because he is credible to give the advice as he is the nutritionist. A nutritionist is an ethical expert to know about nutrition which establishes his credibility and so the statement depending upon credibility, becomes an example of ethos.