Today's exchange rate between the yuan and the U.S. dollar is 6.40 yuan per dollar and the central bank of China is buying U.S. dollars in the foreign exchange market. If the central bank of China did not purchase U.S. dollars would there be excess demand or excess supply of U.S. dollars in the foreign exchange market? Would the exchange rate remain at 6.40 yuan per U.S. dollar? If not, which currency would appreciate? E> If the central bank of China did not purchase U.S. dollars there would be an excess of U.S. dollars in the foreign exchange market. The exchange rate 0 A. demand; The exchange rate would remain at 6.40 yuan per U.S. dollar 0 B. demand; would not remain at 6.40 yuan per U.S. dollar. The Chinese yuan would appreciate O C. supply; would not remain at 6.40 yuan per U.S. dollar. The Chinese yuan would appreciate O D. supply; would not remain at 6.40 yuan per U.S. dollar. The Chinese yuan would depreciate