If a Government Wishes to Keep Its Currency Undervalued Relative

If a government wishes to keep its currency undervalued relative to the U.S. dollar, it would need to:

A) sell dollars on the foreign exchange market.
B) withhold dollars from the foreign exchange market.
C) borrow money from the IMF to keep its currency from collapsing.
D) raise interest rates to attract more purchases of bonds by foreigners.