Choose the correct statement.

A. The benefit from one more unit of a good or service is its marginal benefit, and we measure marginal benefit by the maximum price that is willingly paid for another unit of the good or service.

B. The benefit from one more unit of a good or service is its marginal benefit, and we measure marginal benefit by the area under the demand curve.

C. An efficient outcome results when marginal benefit exceeds marginal cost.

D. The value of one more unit of a good or service is always equal to the price of one more unit of a good or service.

Consumer surplus is _______.

A. greater on the 100th unit of a good that we buy than on the 1st unit of a good that we buy

B. the value of a good minus the price paid for it, summed over the quantity bought

C. equal to the amount that we pay for a good or service

D. the value that we receive by purchasing a good or service