Figure 5-1 Suppose There Are Several Paper Mills Producing

Figure 5-1 Suppose there are several paper mills producing paper for a market.These mills,located upstream from a fishing village,discharge a large amount of wastewater into the river.The waste material affects the number of fish in the river,and the use of the river for recreation and as a public water supply source.Figure 5-1 shows the paper market.Use this Figure to answer the following question(s) .
-Refer to Figure 5-1.Why is there a deadweight loss?

A) because the marginal social cost of producing each additional unit in excess of Q₂ exceeds the marginal benefit
B) because the marginal private cost of producing each additional unit in excess of Q₂ exceeds the marginal benefit
C) because the marginal social benefit of producing each additional unit in excess of Q₂ exceeds the private cost
D) because the marginal private benefit of producing each additional unit in excess of Q₂ exceeds the social cost