Three of the Following Alternatives Illustrate Prosocial Behavior

Three of the following alternatives illustrate prosocial behavior. Which one does not necessarily involve prosocial behavior?

A) Ashley lends a shoulder to cry on when Sarah breaks up with her boyfriend.
B) Bruce shares his lunch with a classmate who forgot hers.
C) Carla and Suellen cooperate on their history project.
D) Dustin asks Maura if she will let him copy her homework.