Research on the Use of Addictive Drugs Indicates That

Research on the use of addictive drugs indicates that

A) an occasional cigarette smoker almost always becomes a heavy smoker.
B) regular marijuana smokers typically experience an irresistible craving for THC.
C) many people are able to stop using addictive drugs without professional help.
D) individuals who receive morphine from physicians for pain relief usually develop the irresistible cravings of an addict.