In an Institution for Delinquent Adolescents, a Behavioral System Has

In an institution for delinquent adolescents, a behavioral system has been implemented in which the adolescents earn points for target behaviors like getting up on time, making beds, and attending class. They are allowed to exchange their earned points for privileges, activities, and so on. They are also charged tokens for inappropriate behaviors, such as staying in bed late or fighting. This system is an example of

A) systematic desensitization.
B) a vicarious learning model.
C) a token economy.
D) a hierarchy of needs.