The Discovery of Chimpanzees Raiding a Neighboring Territory to Assault

The discovery of chimpanzees raiding a neighboring territory to assault an enemy led researchers to question __________.

A) the long-held assumption that other primates are peaceful and that only humans kill their own
B) the long-held assumption that other primates only kill others individually rather than in cooperative alliances
C) the motives that led the chimpanzees to commit this act
D) whether the chimpanzees were consciously aware of their goal