Suppose the price of hamburger is 20 yuan per unit, and the price of soft drink is 5 yuan per unit. Then the opportunity cost of soft drinks for hamburgers—that is, the number of hamburgers the individual has to give up to get one more soft drink—is
A、4.;
B、2.;
C、1/2.;
D、1/4.
发布时间：2025-07-24 00:21:34
