5. Chapter ma2pe09r, Section .22, Problem 011 (ID: 011.22.MANK09) Which of the following practices are, at least in part, attempts to reduce moral hazard problems? Oa. The professors leave the room to prevent cheating on exams. Ob. Tenured professors are not supervised closely. Oc. An employer pays below equilibrium wages because he thinks his employees are not working as hard as they could be. Od. The income of waiters and waitresses depends heavily on tips