Answer:
D. He was prepared to hurt someone.
Step-by-step explanation:
In this essay, the narrator tells us how he reacted to the presence of the waitress. He tells us that he felt extremely angry when he saw "her white face" and the way she got scared because of her proximity to a black man. After she refused to serve him, he attacked her, and then escaped. What the character learned about this is that he was prepared to hurt someone.