Adolescents with ADHD Are at Increased Risk for Substance Use

Adolescents with ADHD are at increased risk for substance use problems.Which of the following is NOT true of research explaining this link?

A) Comorbid conduct problems mediate the association between ADHD and alcohol or drug problems.
B) ADHD is a specific, unique predictor for smoking.
C) The more symptoms of ADHD, the greater the risk of smoking.
D) Stimulant medication makes individuals much more likely to abuse substances.