The correct answer is letter C.
Freud developed a structural model of personality, organizing the psychic apparatus into three structures: ID, ego, and superego. Each is responsible for an aspect of the human personality, governing the interaction of the individual with other people.
ID: is the source of psychic energy and the aspect of personality related to instincts. It is totally unconscious, being formed by drives, instincts, organic impulses and unconscious desires.
Ego: is a rational aspect of the personality responsible for controlling instincts, serving as a mediator and facilitator of the interaction between ID and the circumstances of the external world.
Superego: moral aspect of personality, product of the internalization of values and standards received from parents and society.