Which One of the Following Statements Is Correct Concerning the Foreign

Which one of the following statements is correct concerning the foreign exchange market?

A) The trading floor of the foreign exchange market is located in London.
B) The foreign exchange market is the world's second largest financial market.
C) The four primary currencies that are traded in the foreign exchange market are the U.S. dollar, the British pound, the French franc, and the euro.
D) A cross-rate is the exchange rate of a non-U.S. currency expressed in another non-U.S. currency.
E) The price in U.S. dollars of a foreign currency is referred to as an indirect quote.