How Do Developmental Psychopathologists Characterize Abnormal Behavior

How do developmental psychopathologists characterize abnormal behavior?

A) behavior that interferes with children's competence and does not meet the demands of the environment
B) behavior that leads to psychological distress, impairment, and risk of harm to self or others
C) behavior that leads to psychological distress, impairment, or risk of harm to self or others
D) behavior that is statistically different than the behavior of the typical child