Regarding Marijuana, Which of the Following Statements Is FALSE

Regarding marijuana, which of the following statements is FALSE?

A) Smoking marijuana may increase the risk of a variety of cancers, including lung, prostate and cervical cancer.
B) Marijuana use has been found to be associated with a variety of mental health problems.
C) Activity levels in the cerebellum are higher than normal in marijuana abusers.
D) People who smoke marijuana regularly score lower on IQ tests, although the scores tend to rebound within a month after the person quits using marijuana.