The correct answer is C.
Prosocial behavior is intended to help other people. It is done out of concern, empathy, feelings or rights for others. Its antonym is antisocial behavior.
Some examples of prosocial behavior are: helping, donating, sharing, co-operating, volunteering.
Prosocial behavior is central to the well-being of social groups, including schools. Encouraging prosocial behavior is essential in eliminating undesirable social behaviors.
The purest forms of prosocial behavior are motivated by altruism.