I’m pretty sure it’s D. JSTOR is an online periodical library. ;)
Brutus because of his soliloquies for the audience to gain an insight inot his complex motives and having to be a kind hearted, integrity of a character he had a tragic flaw (key element into knowing a tragic hero) was his lust for power I believe.
Ethos is a mode of persuasion used to convince the audience. It is one of three artistic proofs (ethos, pathos, and logos).
Ethos is also known as ethical appeal and convinces your audience of credibility and character. It is used to prove you are worth listening to. Ethos can be developed by choosing language that is appropriate for the audience and topic (this also means choosing the proper level of vocabulary), making yourself sound fair or unbiased, introducing your expertise, accomplishments or pedigree, and by using correct grammar and syntax.