Which Statement Is Correct

Which statement is correct?

A) Exchange rates are adjusted each morning and held constant until the following morning.
B) The four most commonly traded currencies in the foreign exchange markets are the U.S.dollar, French franc, European euro, and Brazilian real.
C) All South American countries use the peso as their currency.
D) New Zealand uses the same currency as Australia and that is the A$.
E) The foreign exchange market is the largest financial market in the world.