This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Which of the following parts of the mind develops at approximately the time a child starts first grade? 
Select and explain. 
A. Ego, B. Unconscious, C. Superego, D. Conscious
C: Superego
Answer: C: Superego 
Explanation: The superego develops at approximately the time a child starts first grade (6 years of age). The superego controls id (the sexual and aggressive aspects of the mind) impulses and represents moral values and con­science. The ego (the personality) and the id develop at earlier ages. The unconscious and the conscious minds also develop at earlier ages.