Operant conditioning approaches to treatment of alcohol use disorders are based on ___________ and can be used with the goal(s) of __________.

A) aversion therapy; complete abstinence
B) contingency management; complete abstinence
C) contingency management; complete abstinence or moderated drinking
D) differential reinforcement; responsible drinking behavior
E) aversion therapy and differential reinforcement; responsible drinking behavior

Operant conditioning approaches such as contingency management can be used to reinforce abstinence or moderated drinking, making choice C the best option. Aversion therapy, as mentioned in choice A and E, is not typically used in modern treatment for alcohol use disorders, as it has limited effectiveness and ethical concerns. Differential reinforcement, as mentioned in choice D, can be used to reinforce responsible drinking behavior, but this approach may not be appropriate for individuals with severe alcohol use disorders, who may need to aim for complete abstinence.