Which of the Following Statements Best Describes the Role of Cannabis

Which of the following statements best describes the role of cannabis in the development of Schizophrenia?

A) Youths who use cannabis are at increased risk for Schizophrenia, but only if the use cannabis in childhood or early adolescence.
B) Youths who use cannabis are at increased risk for Schizophrenia, but only if they inherit a certain genotype.
C) Youths with Schizophrenia are at increased risk for cannabis use problems.
D) Cannabis use and Schizophrenia are corrected, but the direction of effects is unknown.