During the Seventeenth Century,when European Fur Traders Arrived,the Iroquois Changed

During the seventeenth century,when European fur traders arrived,the Iroquois changed from a peace-loving tribe to fierce enemies of their neighbours,the Hurons.This suggests that

A) aggression is affected by innate propensities and learned inhibitory responses.
B) economic and social competition can elicit aggression.
C) instrumental aggression is inborn.
D) aggressive instincts can even vary within a culture.
E) evolution selected for aggressive behaviours.