The Optimum Level of Pollution Control Is Reached When ____

The optimum level of pollution control is reached when ____.

A) marginal costs of pollution control begins to exceed what the public will pay for control
B) marginal costs of pollution begins 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