According to the Absolute Differences in Cost Theory of Trade

According to the absolute differences in cost theory of trade

A) No country should specialize in the production of any commodity
B) Every country should specialize in the production of commodities which it can produce more cheaply than other countries and exchange it for commodities which are cheaper in other countries
C) Every country should specialize in production of goods which it can produce at higher cost than other countries and exchange it for commodities which are costlier than other countries
D) All of the above