The 82-Year-Old Patient Presented in the Physician's Office for a Routine

The 82-year-old patient presented in the physician's office for a routine physical examination. He gave the receptionist two cards, evidencing his primary, government-funded insurance plan that pays for most of the bill and an additional, private plan that covers the remaining charges. The patient's secondary insurance is called:

A) TRICARE.
B) supplemental.
C) Medicare.
D) capitation.