Suppose That an Industry Emits a Chemical That Pollutes Ground $M P C = Q + 30$

Multiple Choice

Suppose that an industry emits a chemical that pollutes ground water. Without considering the effects of the pollution, the industry has a marginal private cost curve of $M P C = Q + 30$ . The market demand curve is $P = 60 - Q$ , while the marginal social cost curve is $\mathrm { MSC } = 2 \mathrm { Q } + 30$ . What level of emissions fee would achieve the socially optimal level of output?

A) $\$ 54$ .
B) $\$ 32$ .
C) $\$ 12$ .
D) $\$ 10$ .