When Discussing the Origins of Altruistic Behaviour Evident in Many

When discussing the origins of altruistic behaviour evident in many individuals across many circumstances, Dr. Kim asserts that even though it doesn't necessarily benefit the individual, there must have been some kind of adaptive significance produced by this kind of behaviour or it would not be present today. Based on this information, Dr. Kim would most likely identify with which of the following approaches to motivation?

A) social learning theory
B) incentive theory
C) humanistic theory
D) evolutionary psychology