Final answer:
The best diagnosis according to the DSM-5 for a 19-year old with a history of truancy, property destruction, lying, and stealing is Conduct Disorder, given the age and behaviors presented.
Step-by-step explanation:
The diagnosis that best describes the 19-year old in question according to the DSM-5 is likely Conduct Disorder. This individual demonstrates a history of behavior issues including truancy, property destruction, lying, and stealing since the age of 14. These behaviors align with the criteria for Conduct Disorder, which typically manifests with a repetitive and persistent pattern of behavior where the basic rights of others or major age-appropriate societal norms or rules are violated. Antisocial personality disorder, the other potential diagnosis, cannot be diagnosed until the age of 18 and requires a history of Conduct Disorder before the age of 15. Oppositional defiant disorder is characterized by angry/irritable mood, argumentative/defiant behavior, or vindictiveness, but it lacks the more severe aggressive and law-breaking behaviors seen in Conduct Disorder. Intermittent explosive disorder is marked by sudden episodes of unwarranted anger and violence, which does not appear to be present in this case.