According to David Ricardo's Principle of Comparative Advantage, the Gains

According to David Ricardo's principle of comparative advantage, the gains from international trade can be reaped

A) only by developed countries.
B) only by a country with an absolute advantage in the production of some commodity.
C) by any country with opportunity costs different from other countries.
D) by any trading country with opportunity costs similar to other countries.
E) by only one country if opportunity costs are identical across countries.