The Key to the Evolution of Altruism Is That

Multiple Choice

The key to the evolution of altruism is that

A) recipients must be more likely to carry the altruistic allele than nonrecipients.
B) actors must be more likely to carry the altruistic allele than nonactors.
C) recipients must be unrelated to the actors.
D) nonrecipients must be more likely to carry the altruistic allele than recipients.