To which one of the following questions does the author provide enough information to formulate an answer

A. Why do people who are alcoholics continue to drink even though the consequences of their drinking are very unpleasant
B. How did Conger explain the behavior of alcoholics in terms of shock therapy
C. Under what circumstances does an alcoholic benefit from anxiety attacks
D. To what extent does stimulus generalization prevent alcohol ingestion from becoming the signal for another bout of alcohol abuse