David Ricardo's theory of comparative advantage says that:

Multiple Choice

• the benefits of free trade is a short-run phenomenon that will inevitably be reversed by political rent-seeking behavior.

• free international trade increases global economic welfare.

• All of the options.

• international trade is a zero-sum game in which one trading partner gains the expense of another trading partner.

• free trade is a necessary, but not a sufficient, condition for mercantilism.