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

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

Investigator a has biological specimens that are coded and linked to identifiers of the source individuals. investigator a provides the specimens to investigator b but does not provide the individual identifiers. investigator b agrees not to re-identify the source individuals. is investigator b's research using the biospecimens human subjects research according to the definition of human subjects research in the federal regulations?