If the opportunity cost of production rises as more of a good is produced,

• A.a country may not specialize completely in the goods in which it has comparative advantage
• B.a country will specialize in producing only those goods in which it has a comparative advantage
• C.a country should produce any good in which it has an absolute advantage
• D.the terms of trade will be independent of opportunity costs
• E.the production possibilities curve will be a straight line