The Decline in the Rate of Cigarette Smoking in the United

The decline in the rate of cigarette smoking in the United States can be traced to

A) a report from the U.S. Surgeon General that linked smoking with adverse health effects.
B) adverse weather conditions in southeastern states that significantly reduced the supply of tobacco.
C) the successful use of hypnosis by health psychologists to get people to stop smoking.
D) an agreement among movie producers and directors to stop portraying cigarette smoking.