A Clinical Trial Evaluating Naltrexone Found That

A clinical trial evaluating naltrexone found that:

A) naltrexone combined with coping skills therapy is an effective treatment approach to reducing craving and relapse.
B) naltrexone alone was an effective treatment approach to reducing craving and relapse.
C) naltrexone combined with coping skills therapy was not an effective treatment in reducing craving and relapse.
D) naltrexone combined with coping skills therapy is an effective treatment approach to reducing craving but not relapse.