Ego Psychology Is the Study of How an Individual Interacts

Ego psychology is the study of how an individual interacts with the external world, as well as the responses to internal forces. Proponents of this practice focus on the ego's normal and pathological development, management of aggressive impulses, and its adaptation to reality. What is an example of an ego function?

A) Reality testing
B) Impulse control
C) Affect regulation
D) All of the above