Based on the passage provided, the correct answer to the multiple-choice question regarding how paragraph 10 advances the plot is:
It introduces the conflict between the narrator's mother and father.
In this paragraph, the strain between the narrator's parents is highlighted when the father reacts strongly to the perceived slight from the class president. His anger and decision to not attend the reunion reflects underlying tensions and differing perspectives within the family, particularly how they navigate their identities and perceptions between cultures.