It's Not Likely That a Country Will Specialize Completely in One

Multiple Choice

It's not likely that a country will specialize completely in one good even if it has a lower opportunity cost because

A) Comparative advantage is not a workable concept in the world economy.
B) Opportunity costs increase as more of a good is produced.
C) The country would want to save some of the good for its own citizens.
D) The country would end up inside its production possibilities curve.