The Efficient Level of Pollution Is

The efficient level of pollution is:

A) the quantity at which its total benefits exceeds its total costs by the greatest possible amount.
B) the quantity at which its total benefits equals its total costs.
C) where the marginal benefit of an additional unit of pollution emission is greater than the marginal cost of the additional unit of pollution.
D) where the marginal benefit of an additional unit of pollution emission is less than the marginal cost of the additional unit of pollution.