Which of the following is not correct? a. The producer who gives up less of other goods to produce Good X has the smaller opportunity cost of producing Good X. b. The producer who has the smaller opportunity cost of producing a good is said to have a comparative advantage in producing that good. c. The gains from specialization and trade are based not on comparative advantage but on absolute advantage. d. The producer who requires a smaller quantity of inputs to produce a good is said to have an absolute advantage in producing that good