Answer: B. It is an exposition of Sunil's background and the introduction to a conflict.
Step-by-step explanation: In a story, the conflict is the element that makes the characters act, it is the reason and the main plot of the story. In the given excerpt from Sunil's personal narrative, the speaker narrates his experience from when he first arrived to the United States, and how he noticed that people often made assumptions about his culture, this introduces the conflict of the narrative, that is the struggle Sunli lived for his culture and skin color.