For problem drinkers, most relapses occur within after the end of treatment program.

Relapse is the return to the alcohol and is greatest danger for anyone who has entered treatment program.Once the person has returned to their previous addictive behavior, the possibility that he will ever get another opportunity to quit is smaller. For problem drinkers, most relapses occur within 90 days  after the end of treatment program. Identifying the causes for relapse is very important in finding solutions how to prevent them.

The answer might be d