All of the Following Are Reasons for Health Care Expenditures

All of the following are reasons for health care expenditures in the U.S. rising except:

A) the demand for health care has risen.
B) the supply of physicians is restricted by the American Medical Association
C) the government (FDA) restricts entry of drugs to the U.S. marketplace
D) health insurance is regulated on a state-by-state basis so someone cannot buy a less expensive policy from an insurer in another state
E) the federal government has had such a small role in health care.