In a supply and demand graph, the triangular area under the demand curve but above the market price is

a. the consumer surplus.

b. the producer surplus.

c. the marginal cost.

d. the deadweight loss.

e. the net gain to society from trading that good.

Use the following demand schedule to answer questions 2 and 3.

Fred’s demand schedule for DVDs is as follows: At $30 each, he would buy 1; at $25, he would buy 2; at $15, he would buy 3; and at $10, he would buy 4.