Question: A 17-year-old boy with no significant past medical history presents with his parents for concerns regarding his aggressive behavior. His parents report he has had behavior problems since he was a young child. The patient laughs when asked what type of behavioral problems and states, "Just the normal everyday kid stuff, like being kicked out of school for beating up a classmate and lighting the neighbor's cat on fire." When asked how the neighbors felt about his actions, he replies, "Who cares? It's not my cat." He denies any mood symptoms or changes to his sleep. What is the most likely diagnosis? A. Antisocial personality disorder B. Psychopathy C. Conduct disorder D. Disruptive mood dysregulation disorder (DMDD)