I wanna say A or C
They both seem like they'd work
She was 16. She originally started to write this book because on of her friends had gotten beat up so she just wanted to rant, another fun fact: since she was so young and also a girl, she didnt want people to not buy her book becuaseof that so she decided to stay anomus just like j.k rowling
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.