Preferred Provider Organizations (PPO) and Health Maintenance Organizations (HMO) _____

Preferred provider organizations (PPO) and health maintenance organizations (HMO) _____.

A) primarily aim at reducing health care costs paid by employees by putting the burden on the employers.
B) does not provide health care services to the private sector organizations.
C) increase the cost borne by companies providing health care benefits.
D) are the most common forms of managed care.