Determining the Effects of Natural Selection on Human Behavior Is

Determining the effects of natural selection on human behavior is much more robust if ________.

A) one disentangles the effects of culture from evolutionary history in detailed, controlled studies of a single culture
B) groups of humans are separated into control and treatment groups for extensive experimentation
C) data is collected cross-culturally to eliminate the effects of culture on behavior
D) We cannot study human behavior in an evolutionary context.