If a nation has a comparative advantage in the production of X, this means the nation:

A.  cannot benefit by producing and trading this product.
B.  must give up less of other goods than other nations in producing a unit of X.
C.  has a production possibilities curve identical to those of other nations.
D.  is not subject to increasing opportunity costs.

FOORQUIZ ANSWER:

B.  must give up less of other goods than other nations in producing a unit of X.