The optimum level of pollution control is reached when ____.
A. marginal costs of pollution control begin to exceed what the public will pay for control
B. marginal costs of pollution begin to exceed the marginal costs of pollution control
C. the marginal cost of pollution control intersects with the marginal cost of pollution
D. demand for pollution clean-up exceeds the capacity to clean pollution
E. technologies become affordable to clean up pollution
Answer: C
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Fill in the blank(s) with correct word