12. Country A's opportunity cost of producing 1 ton of corn is 5 tons of wheat , while Country B's opportunity cost of producing 1 ton of corn is 1/3 of a ton of wheat. Which of the following statements is true? a. Country A should specialize in producing corn, while Country B should specialize in producing b. Country B should specialize in producing corn, while Country A should specialize in producing C. There will be no gains from trade if these two countries exchange goods. d. Both countries should produce both goods. wheat. wheat