The Efficient Level of Pollution Is

The efficient level of pollution is:

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