I would say that the statement that best shows the author's use of ethos is D: <em>He is not culturally "disadvantaged", but he is culturally "different".</em>
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 "<em>different</em>"; 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).
He is terrified but more concerned to as why the raven is talking, he didnt screem or run when he heard the raven talk. I would run if a animal ever talked to me. Hope this helps!
even though adverbs are more commonly thought of as words ending with -ing, they aren't always! "never" is an adverb that describes how often he misses chess club. how often? never!