Answer:
I think that the character trait that the passage from The Absolutely True Diary of a Part-Time Indian by Sherman Alexie reveals about Arnold is that he feels hopeful. The correct answer would be A.
Step-by-step explanation:
Despite of being in a really different position now, according to this excerpt, Arnold dreams of escaping the reservation, he dreams about being an artist one day, as many other brown people he knows. His tone feels sweet and tender, when he draws, he says, he feels free, he feels he has something to tell the world. Drawing is his passion and he feels powerful when he does it, he feels happy and knows that passion of him can be his salvation, the door to freedom.