Patrick Has to Choose Between Helping a Colleague at Work

Multiple Choice

Patrick has to choose between helping a colleague at work to finish a project that is overdue and helping his brother to repair the storm damage suffered by his house. He chooses to help his brother. His choice is best explained by the notion of

A) inclusive fitness.
B) personal fitness.
C) reciprocal altruism.
D) kin selection.
E) nonfamilial altruism.