Which of the following statements is true?

• A.International trade does not reflect the benefits of specialization.
• B.A nation should specialize in producing a good in which it has an absolute advantage.
• C.A nation should specialize in producing a good in which it has a comparative advantage.
• D.A nation should specialize in producing a good only when it has both an absolute and a comparative advantage.
• E.Exports tend to decrease economic efficiency.