Regarding Marijuana,which of the Following Statements Is FALSE

Regarding marijuana,which of the following statements is FALSE?

A) If a person smokes marijuana just once a week,the body is never entirely free of THC since it accumulates in fatty tissues.
B) Marijuana use has been found to be associated with mental health problems with chronic users being more prone to develop psychosis.
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.