A person who paid $10 for an umbrella in the U.S. sees the exact same umbrella in a store in London, England for 6 British pounds. If the person could expect the real exchange rate to be 1 U.S. umbrella per 1 English umbrella, then the person could infer that the nominal exchange rate is
a. 0.6 U.S. dollars per 1 English pound.
b. 1.67 U.S. dollars per 1 English pound.
c. 0.6 English pounds per I U.S. dollar.
d. 1.67 English pounds per 1 U.S. dollar.