Assume the Foreign Exchange Rate for the Euro Was U

Assume the foreign exchange rate for the euro was U.S. $1.00 = .91 euro last month. This month, the exchange rate is U.S. $1.00 = .88 euro. This information indicates that over the past month the

A) U.S. dollar remained unchanged relative to the euro.
B) U.S. dollar appreciated relative to all foreign currencies.
C) euro appreciated relative to the dollar.
D) euro depreciated relative to the dollar.