The graph attached below suggests that the private market provides incentives to 300 250 Social MC 200 Private MC Price (S/ton) 150 100 50 0 D 100 200 300 400 500 600 Quantity (tons of paper per year) O A. eliminate the externalities generated by the paper production. O B. over-price paper relative to the social optimum O C. over-produce paper relative to the social optimum O D. under-produce paper relative to the social optimum