According to Anna Freud's Ego Psychology, When Does Abnormal Behaviour

According to Anna Freud's ego psychology, when does abnormal behaviour develop?

A) when the ego does not develop normally due to psychosexual conflicts at the oral stage of development
B) when the ego is deficient in regulating such functions as delaying and controlling impulses
C) when there are social and psychological barriers to achieving self-actualization
D) when maladaptive defense mechanisms are not overridden by adaptive defense mechanisms