Stimulation of the Amygdala in Dominant Rhesus Monkeys Often Yields

Stimulation of the amygdala in dominant rhesus monkeys often yields aggression,whereas stimulation of the amygdala in less dominant monkeys may yield either fight or flight,depending on the status of another nearby monkey (Moyer,1976) .These results suggest that in nonhuman primates,

A) some additional structure at the core of the brain is involved in aggression.
B) both social and biological factors play a role in aggression.
C) aggression is primarily biologically determined.
D) group norms influence the acceptability of aggression.