Why Is a Retreatist Subculture a Key Component of Using

Why is a retreatist subculture a key component of using illicit drugs, according to the opportunity structures theory?

A) These subcultures provide support for self-medication required for the emotional pain of self-derogation.
B) These subcultures define the lower class "addict" separately from the upper class "drug user."
C) These subcultures blunt the emotional impact of being unable to achieve conventional goals using socially approved means.
D) These subcultures provide access and rationalizations for illicit drug use.