Which of the following is the most commonly used illegal mood-altering substance?
a. Cocaine or crack ecstasy
b. Heroin
c. Marijuana
d. Methamphetamine or speed
ESSAYBID ANSWER
ANS: C
Marijuana was the most commonly used illicit drug. In 2011, there were 18.1 million past month users. Between 2007 and 2011, the rate of use increased from 5.8% to 7.0%, and the number of users increased from 14.5 million to 18.1 million.
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