A 15-year-old boy is admitted to the healt
题型：单项选择题
问题：
A 15-year-old boy is admitted to the health care facility after acting out his aggressions inappropriately at school. Predisposing factors to the expression of aggression include which of the following
A. Violence on television.
B. Passive parents.
C. An internal locus of control.
D. A single-parent family.