List and describe the four groups of alcohol and drug users. Which type or classifications of alcohol and/or drug user is considered the most severe?...

List and describe the four groups of alcohol and drug users. Which type or classifications of alcohol and/or drug user is considered the most severe?

List and describe the four groups of alcohol and drug users. Which type or classifications ofalcohol and/or drug user is considered the most severe? The four groups of drug and alcohol users are...