The answer could be that the author wanted to show readers how unjust, cruel, and incorrect prejudices can be. After the main conflict is resolved, the narrator goes on to prove how incorrect everyone's prejudices about the Duvitches were.
I read that book last year :)
Mature or adult would be your answer.
I think you forgot to add the passage along with the question. I am answering the question based on my knowledge and research. "She is gloomy and depressed" is the one among the following choices given in the question that is how Sally's <span>mood correspond to the setting, as described in the passage.</span>
