Which of the following best shows the authors use of ethos

C, because it shows that he was being taught traditional belief of a culture

I would say that the statement that best shows the author's use of ethos is D: He is not culturally "disadvantaged", but he is culturally "different".

Explanation:

By saying this, the author makes clear for the audience that the person that sustains that there are thirteen months in a year is not very reliable because he is culturally "different"; he has been taught that by traditional people. So, by making that clarification, the author expresses this person's credibility and that is what ethos does: it tries to convince an audience by appealing to the character's credibility (or lack of).

kenny´s more than 25 years of relevant public service. in the army for two decades, as official representative for four years, and now for the department of state, as ambassador. this career clearly demonstrates great capacities in the public sector.

stating you point whats is aking you to write about?