Well, this would really be your opinion. If you don't understand the question, read through the words in bold. It seems like the question is asking if you believe in the stereotypes that were presented in Hurston's essay. The "happy darky" that "sings and dances for white folks" and the "educated black person" that "is still a "heathen"?"
I would go with D) It helps show the author's voice because the author is saying that the person is making him sad at night so u could say he is opening his feelings.