Identify a True Statement from the Following

Identify a true statement from the following.

A) Supervisors should not only punish problem behavior but also reward desirable kinds of behavior.
B) Explaining the consequences of violating rules is not the responsibility of a supervisor.
C) Employees usually stay away from engaging in problem behavior when they feel frustrated.
D) Implementation of self-discipline is a redundant concept because most people get satisfaction from doing a job well.