Rapid increases in the U.S. exports of goods and services will result in a(n) _____ foreign currency and a(n) _____ the U.S. dollars in the foreign exchange market.
选项：

A:increase in the demand for; increase in the supply of
B:increase in the supply of; increase in the demand fo
C:shortage of; surplus of
D:decrease in the supply of; decrease in the demand fo