It is a DUI offense committed by a minor if a driver under 21 years old has of alcohol in his or her system.

Any measurable amount

Explanation: If you are under 21 years of age, as little as one sip of alcohol makes it illegal for you to drive. If you are convicted of driving after consuming alcohol and your BAC is at any measurable amount, you can be fined and your license will be suspended or revoked.

The one who is correct above is Doug. It is because behavior problems occur in a way of expressing a person's feelings or emotions in which they show it in a way that is not normal or it could also be defined as not being able to react accordingly. It could be related to what has Doug said that behavioral problem occur when socialization isn't performed during the sensitive period, in which this points out that the person who is doing this or behaving this way does not react accordingly, this means he or she has a behavioral problem.