Spending on Medical Programs Such as Medicare and Medicaid Has

Spending on medical programs such as Medicare and Medicaid has proven difficult to control because

A) spending on Social Security has declined so significantly.
B) state and local governments have refused to contribute to the costs of administering these programs.
C) these programs are indexed to grow at two times the rate of inflation.
D) of the growing number of people eligible, and because of rising health care costs.