Which of the following behaviors does Disruptive Behavior Disorder primarily involve?

Disruptive Behavior Disorder encompasses a range of behavioral issues primarily characterized by patterns of oppositional and defiant behavior. This disorder is often marked by a persistent pattern of angry or irritable mood, argumentative or defiant behavior, and vindictiveness, which are key features that impact the individual's interactions with authority figures and peers. Children with this disorder frequently challenge rules, exhibit tantrums, and may refuse to comply with requests or rules, which can disrupt social, educational, or family functioning.

The other behaviors listed reflect different conditions or disorders. Excessive agitation and hyperactivity are more closely associated with Attention-Deficit/Hyperactivity Disorder (ADHD). Severe social withdrawal and isolation relate to anxiety disorders or depressive disorders, while exaggerated emotional responses can be indicative of mood disorders. Therefore, the focus on oppositional and defiant behavior specifically aligns with the diagnostic criteria for Disruptive Behavior Disorder, making it the correct choice.