Suppose the Exchange Rate of the U

Suppose the exchange rate of the U.S.dollar was 1.50 British pounds = $1.00 (U.S.) on Wednesday,and on the following Monday the exchange rate was $.75 (U.S.) = 1.00 British pound.Which of the following best describes what happened between Wednesday and the following Monday?

A) The U.S. dollar appreciated against the British pound.
B) The British pound appreciated against the U.S. dollar.
C) The U.S. dollar depreciated against the British pound.
D) Both answers B and C are correct.