Suppose the market demand curve for a good passes through the point (quantity demanded = 100, price = $25). If there are five buyers in the market, then
Choose one answer.
a. the marginal buyer's willingness to pay for the 100th unit of the good is $25.
b. the sum of the five buyers' willingness to pay for the 100th unit of the good is $25.
c. the average of the five buyers' willingness to pay for the 100th unit of the good is $25.
d. all of the five buyers are willing to pay at least $25 for the 100th unit of the good.