On a diagram of a production possibilities frontier, opportunity cost is represented by the production possibilities frontier shifting outward

A purchase of U.S. government securities by the Fed causes

A) an expansion of the money supply equal to the amount of the securities purchased. B) a contraction of the money supply equal to the amount of the securities purchased. C) an expansion of the money supply of more than the amount of the securities purchased. D) a contraction of the money supply of more than the amount of the securities purchased.

The free trade zone that includes Argentina, Brazil, Paraguay and Uruguay is known as _______________.

Fill in the blank(s) with the appropriate word(s).