-The Figure Above Shows the Market for Private School Education

-The figure above shows the market for private school education in Adelaide. There is no external cost of private education. If the government does not intervene in this market, the equilibrium number of students being privately educated is ________ and the efficient quantity is ________.

A) 600 students; 600 students
B) 0 students; 400 students
C) 400 students; 400 students
D) 400 students; 600 students
E) 600 students; 400 students