Dennis Has Disorganized Type of Schizophrenia

Dennis has disorganized type of schizophrenia.He has lived in an institution for years.He rarely shows any attempt at socializing.A new program is started - every time Dennis speaks to another person he is given a piece of red paper.At the end of each week,he can use the red papers to get cigarettes or extra privileges.This new program is

A) an in vivo exposure program.
B) a token economy.
C) guided exposure.
D) modeling.