Billy, age 13, lives with his grandmother since his mother died in childbirth. He skips school, sometimes stays out all night, and brings home electronic games and equipment that he claims were given to him by friends. He angers easily and sometimes picks fights. His diagnosis is likely to be:
A) Conduct Disorder
B) School Refusal Disorder
C) Oppositional Defiant Disorder
D) Social Phobia Disorder
The correct answer is "A".