Answer: A - Contingency management. Contingency management is a behavioral treatment based on operant conditioning principles. Contingency management (CM) uses rewards to reinforce behavioral changes. For example, small prizes or vouchers for items or even cash are offered in return for positive behaviors such as negative drug tests or breathalyzer results. Reward values may stay the same or increase with ongoing abstinence. The rewards stop in the event of negative behavior, such as relapse.