According to David Ricardo's Principle of Comparative Advantage,there Will Be

According to David Ricardo's principle of comparative advantage,there will be gains from international trade

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