If a Firm Is Not Forced to Take Account of a Negative

If a firm is not forced to take account of a negative externality it creates,it will produce the quantity at which

A) the marginal cost of production equals the marginal private benefit
B) the marginal cost of production equals the marginal social benefit
C) the marginal social cost of production the equals marginal private benefit
D) the marginal social cost of production equals the marginal social benefit
E) price equals marginal social benefit