A foreign currency will, on average, depreciate against the U.S. dollar at a percentage rate approximately equal to __.

a. the amount by which the rate of inflation in the other country exceeds that of the United States
b. the amount by which the rate of inflation in the United States exceeds that of the other country
c. None of the above
d. the rate of inflation in the United States
e. the rate of inflation in the foriegn country