The Supply of Russian Rubles to the Foreign Exchange Market

The supply of Russian rubles to the foreign exchange market derives from

A) surplus rubles created by a favorable balance of trade in Russia
B) foreigners who exchange their currencies so they can buy French Russian goods
C) foreign firms that invest in Russia
D) the excess reserves in Russia held by foreign governments
E) Russian people who exchange rubles for other currencies so that they can buy other countries' goods