Which of the following is correct about comparative advantage?
A) some countries will have a comparative advantage in everything
B) having a comparative advantage without an absolute advantage is impossible.
C) A comparative advantage in a good means that the country can produce more of the good than any other country.
D) A country has a comparative advantage in the production of a good if it can produce the good at lower opportunity cost than any other country.
E) None of these answers is correct