Which of the Following Explains Why Managers of Government Agencies

Which of the following explains why managers of government agencies have little incentive to achieve operational efficiency?

A) Public-sector managers need not fear bankruptcy when operational efficiency is not achieved.
B) Public-sector managers seldom receive personal benefits if they find ways to improve the efficiency of their operations.
C) Public-sector agencies typically do not face competition.
D) All of the above explain why government agencies have little incentive to be efficient.