Why does the author include details about the narrator’s brother making the baseball team in "The All-American Slurp"?

to reveal the importance of physical fitness to the Lin family
to highlight the Lins’ admiration for American traditions
to illustrate the similarities between sports in America and China
to emphasize that each member of the Lin family discovers how to fit in

The author includes details about the narrator's brother making the baseball team in "The All-American Slurp" to emphasize that each member of the Lin family discovers how to fit in.