Final answer:
The mother's statement underestimating the influence of peer experimentation indicates a need for further teaching on the risk factors of substance abuse.
Correct option is B
Step-by-step explanation:
The mother's response that indicates a need for further teaching is "Just because his friends are experimenting does not mean that he will." While it's true that not every child will follow their peers into substance use, peer influence is a strong risk factor for drug and alcohol abuse in adolescents.
The other statements made by the mother accurately identify risk factors for substance abuse, such as a family history of alcoholism, parental substance abuse problems, and negative life events.