The Federal Reserve's Expansionary Monetary Policy Has Kept Interest Rates

The Federal Reserve's expansionary monetary policy has kept interest rates at historic low levels in an effort to stimulate economic growth,while at the same time the central banks of some countries that are experiencing faster recoveries from the recession have begun to tighten their monetary policies.As a result,this has caused

A) the value of the U.S. dollar to increase relative to the foreign currencies of the countries with tightening monetary policies.
B) the value of the U.S. dollar to decrease relative to the foreign currencies of the countries with tightening monetary policies.
C) demand for the U.S. dollar to increase.
D) the value of most currencies from developing countries to increase relative to other currencies.