A marginal external cost is:
A.	the cost associated with producing an additional unit of a product.
B.	the cost of producing an additional unit of a product that accrues to a third party who is not involved in producing or consuming the product.
C.	the cost imposed on society by the production of an additional unit of a product.
D.	the cost imposed on consumers by the production of an additional unit of a product.
Answer:B
A marginal external cost is:
A.	the cost associated with producing an additional unit of a product. B.	the cost of producing an additional unit of a product that accrues to a third party who is not involved in producing or consuming the product. C.	the cost imposed on society by the production of an additional unit of a product. D.	the cost imposed on consumers by the production of an additional unit of a product.