Which of the Following Best Describes the Implications of the Law

Which of the following best describes the implications of the law of comparative advantage? If each person sells goods for which he or she has the greatest comparative advantage in production and buys those for which his or her comparative advantage is least, the

A) total output available to each person can be expanded by specialization and exchange.
B) total output will fall.
C) buyers of goods will gain at the expense of sellers.
D) sellers of goods will gain at the expense of buyers.