Final answer:
Medicare is a federally funded health care program that provides health insurance to individuals who are eligible for Social Security, primarily serving people over the age of 65. Correct option is D.
Step-by-step explanation:
Medicare is a federally funded health care program. It was created as part of the Social Security Act of 1965 by the U.S. government, and it provides health insurance to individuals who are eligible for Social Security.
Medicare primarily serves people who are over the age of 65, but it also covers individuals who meet certain standards for disability.