Peers, families, role models, and media are all examples of that can affect your decisions about drugs.

a. external influences
b. economic influences
c. private influences
d. internal influences

A. external influences

Explanation:

A drug can be define as a natural or synthetic substance which affects the functioning and structure of the body in a positive as well as in negative manner. The overdose of drugs is likely to affect the body in a negative sense . The overdose of drugs can be responsible for drug toxicity.

The peers, families and role models and media all are the examples of external influences that can affect the decision of drug consumption or usage.  As these can guide the person but the use and choice of drug is the own decision of the consumer or abuser.