When Considering an Entire Industry, the Marginal Benefit of Reducing

When considering an entire industry, the marginal benefit of reducing pollution is expected

A) to fall as the amount of pollution abatement rises.
B) to be always greater than the marginal cost of pollution reduction.
C) to exceed the marginal cost of pollution abatement for all positive levels of pollution.
D) to remain constant for all levels of pollution control.
E) to rise as the level of pollution gets closer to zero.