An amusement park is an example of a pure private good

The U.S. is probably the most open international market among the industrialized countries. What then does the U.S. have to gain by joining the WTO?

What will be an ideal response?

If fewer U.S. dollars are needed to buy a Swiss franc, then

a. Swiss goods become relatively more expensive to U.S. residents b. U.S. residents buy fewer francs c. U.S. goods become relatively cheaper to Swiss residents d. U.S. residents buy more Swiss goods e. U.S. residents supply more francs