What concept is involved when one disproportionately powerful actor can help provide the collective good, either directly or indirectly?

Suppose that there is a balance of trade in both the United States and Canada. Then, the U.S. dollar appreciates against the Canadian dollar. What would the likely outcome be?

(A) A trade deficit in both countries. (B) A trade surplus in the United States. (C) A trade deficit in Canada. (D) A trade surplus in Canada.

Other things being equal, the effect of an increase in the price of Coca-Cola would cause a(n):

A. upward movement along the demand curve for Coca-Cola. B. leftward shift in the demand curve for Coca-Cola. C. downward movement along the demand curve for Coca-Cola. D. rightward shift in the demand curve for Coca-Cola.