Which of the Following Factors Is Believed to Underlie an Evolutionary

Which of the following factors is believed to underlie an evolutionary basis for human empathy?

A) Individuals who were able to evoke empathy in others gained a survival advantage.
B) Displays of altruism were more likely to result in gaining sexual favors.
C) Altruistic people were more likely to produce twins, and therefore increase total reproduction.
D) Being able to recognize altruistic traits resulted in selecting a similarly altruistic mate.