Final answer:
TRICARE covers active-duty service members, National Guard members, reserve members, and their families. It is a government-funded health-care program separate from Medicare, which provides insurance to individuals 65 and older.
Step-by-step explanation:
The TRICARE program is a government-funded health-care program that provides coverage to active-duty service members, National Guard members, reserve members, and their families. This program is distinct from Medicare, which is another government-funded health care program providing health insurance to all those over age 65. TRICARE also provides health benefits to military retirees and their dependents, including some members of the Reserve Component. Other government-funded programs include Medicaid for very low-income individuals, the Veterans Health Administration for veterans, the Indian Health Service for Native Americans, and the Children's Health Insurance Program (CHIP) for children in families with relatively low incomes.
Based on the options presented in the question, the correct answer would be option 'a': active-duty service members, National Guard members, and reserve members are covered under the TRICARE program.