What Is an Example of an HMO

What is an example of an HMO?

A) Nurse practitioners are paid promptly at discounted fees for each service rendered at a women's health clinic.
B) Physicians in a large urban center are reimbursed for visits made to their clients.
C) Physicians are paid for each service delivered to enrolled patients through a prepaid plan.
D) Patients pay fixed annual fees for ambulatory care services, regardless of actual utilization of health services.