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There are two plants in an industry. To reduce pollution, the government has imposed environmental standards forcing each plant to cut emissions by 60%. At the emissions standard, the marginal social benefit of pollution for plant A is $500, and the marginal social benefit of pollution for plant B is $125. The same level of pollution can be achieved at a lower cost by:
A.
forcing plant A to reduce emissions and allowing plant B to increase emissions.
B.
allowing plant A to pollute more and requiring plant B to pollute less.
C.
forcing both plants to reduce emissions.
D.
allowing both plants to pollute more.