The Coalitions Between Two Male Chimpanzees Against a Third Male

The coalitions between two male chimpanzees against a third male in Frans de Waal's classic study of Chimpanzee Politics:

A) Provide strong evidence of kin selection
B) Could have been mutually beneficial to both males
C) Are responses to captivity, as no wild primates behave this way
D) Reflect stable, life-long bonds