If the "Marginal Congestion Cost" for a public good is constant then the optimal number of users is infinite

Refer to Figure 19-10. Under the Bretton Woods System of exchange rates, if the par exchange rate was $2 per pound in the figure above, and equilibrium persisted at $3, then a revaluation of the currency would have

A) led to a balance of trade surplus. B) increased the price of imports to Britain. C) led to a current account surplus. D) increased the price of British exports to the United States.

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.