Answer:
Conduct Disorder.
Step-by-step explanation:
Conduct disorder is a behavioral disorder diagnosed in adolescents. It is a repetitive behavioral pattern in which adolescents lack empathy, their behavior is anti-social and break the rules. A child diagnosed with conduct disorder tend to reveal threatening conditions fo themselves and others as well.
In the given case, Sam will be diagnosed with conduct disorder. It is because his behavior reveals the symptoms of conduct disorder. He fights with other boys (threatening for others) and destroyed school property, and cheats. All these symptoms are of conduct disorder.
Thus, the correct answer is conduct disorder.