Izak Noted That on Star Trek, Only the Humans Are

Izak noted that on Star Trek, only the humans are depicted as having multiple cultures and diversity, while all of the alien species are depicted as having a single culture. Remembering his social psychology class, Izak noted that this was an example of

A) in-group - outgroup bias.
B) outgroup homogeneity effect.
C) in-group favouritism.
D) social comparison.