Marginal Social Cost Is the

Marginal social cost is the

A) price a consumer pays for one more unit of a good.
B) cost a producer incurs producing one more unit of a good.
C) cost of producing one more unit of a good that falls on someone other than the producer.
D) sum of the cost a producer incurs from producing one more unit of a good plus the cost of producing one more unit of a good that falls on someone other than the producer.
E) same as marginal cost only if there is an external cost when the good is produced.