To Prevent the Dollar from Depreciating, the U

To prevent the dollar from depreciating, the U.S. central bank that tries to fix the currency value of the dollar can

A) buy U.S. dollars in the foreign exchange market.
B) sell U.S. dollars in the foreign exchange market.
C) abandon the U.S. dollar and use another country's currency as its legal currency.
D) buy foreign currencies in the foreign exchange market.