If the Production of a Good Causes an External Cost,then

Multiple Choice

If the production of a good causes an external cost,then the efficient quantity is

A) equal to the quantity at which the marginal benefit equals marginal cost.
B) less than the quantity at which the marginal benefit equals the marginal cost.
C) more than the quantity at which the marginal benefit equals the marginal cost.
D) the quantity at which the marginal private benefit is greater than the marginal social benefit.
E) None of the above answers is correct.