Regarding Marijuana,which of the Following Statements Is FALSE

Regarding marijuana,which of the following statements is FALSE?

A) Activity levels in the cerebellum are lower than normal in marijuana abusers.
B) The THC in marijuana may interfere with menstrual cycles and ovulation as well as causing a higher rate of miscarriages.
C) Children whose mothers smoked marijuana during pregnancy showed a lowered ability to succeed in challenging,goal-oriented activities.
D) Marijuana smoke has been found to contain less cancer-causing hydrocarbons and less tar than tobacco smoke does.