Country A's PPF Country B's PPF 270- 200 Corn (millions of bushels) Corn (millions of bushels) 200 180 Oil (millions of bbis) Oil (millions of bbls) From the PPFs shown above it can be determined that the opportunity cost of oil is lower in country (1) Given the comparative opportunity costs as revealed by the PPFs shown above, the comparative advantage for country B lies in (2) After these two countries specialize and trade with each other, country A will be importing (3) (1) O B (2) O oil (3) O both goods OA corn O oil O corn