The Authors Provide the Text of a UPI Story Describing

The authors provide the text of a UPI story describing the discovery of the bones of a disabled dwarf in a cave in northern Italy.The evidence recovered was interpreted by anthropologists to suggest that

A) helping behavior is motivated only by rewards.
B) there is no validity to the empathy-altruism hypothesis.
C) humans help others even when there is no reward for doing so.
D) helping behavior has evolved only in the last 2,500 years of human history.