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, England.

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. Importers, exporters, and speculators are key players in the foreign exchange market.

E. The U.S. created a communications network called SWIFT to facilitate currency trading.