Studies of Chronic Users of Cannabinoids Have Demonstrated That

Multiple Choice

Studies of chronic users of cannabinoids have demonstrated that

A) their general intellectual functions are substantially lower than those of nonusers (when groups are matched according to factors other than cannabis use)
B) flashbacks may occur, but it is not clear that these are due to cannabis use but due to other drug use
C) their body weights are significantly lower than in nonusers
D) all of the above