In Freud's Theory, Why Does the Ego Have a Difficult

In Freud's theory, why does the ego have a difficult job?

A) Because the ego is the conscience, it must constantly resist temptation.
B) Because the ego is the executive, it must resolve conflicts between the id and superego.
C) Because the ego operates on the pleasure principle, it must find ways to avoid unpleasant situations.
D) Because the ego is entirely unconscious, it has difficulty influencing conscious behavior.