The mother of a 6-year-old child expresses concern over the child's frequent temper outbursts. He deals with any frustration by bullying and hitting, and seldom shows any remorse for his actions. The nurse who gathers this data will note that the child's behaviours are most consistent with which DSM-5 diagnosis?

Choice A reason: Oppositional Defiant Disorder (ODD) is characterized by a pattern of angry or irritable mood, argumentative or defiant behavior, and vindictiveness. While ODD involves hostility, it generally does not include the level of physical aggression toward others or the serious violation of societal norms seen in Conduct Disorder. Choice B reason: Social Phobia, or Social Anxiety Disorder, involves an intense fear of being watched and judged by others in social situations. It leads to avoidance behaviors and significant distress in social interactions, which is the opposite of the aggressive, bullying, and externalizing behaviors described in the child's clinical presentation. Choice C reason: Conduct Disorder involves a repetitive and persistent pattern of behavior in which the basic rights of others or major age-appropriate societal norms are violated. Bullying, physical aggression (hitting), and a lack of remorse are core diagnostic criteria that differentiate this disorder from less severe behavioral issues. Choice D reason: Attention-Deficit/Hyperactivity Disorder (ADHD) is characterized by a persistent pattern of inattention, hyperactivity, and impulsivity. While impulsive behavior can lead to frustration, ADHD does not inherently include intentional bullying, physical aggression, or a lack of remorse, which are specific markers of a more severe behavioral disturbance.