According to Freud, which part of the personality is concerned with reality?

A. Id: The id is the primitive part of personality driven by pleasure and basic instincts (e.g., hunger, sex), with no concern for reality. B. Superego: The superego represents moral standards and ideals internalized from society and parents-focused on "shoulds" and guilt. C. Ego: The ego is the rational part that mediates between the id, the superego, and the external world. It operates based on the reality principle. D. Superid: This is not a valid Freudian term.