Which One of the Following Statements Is the MOST Accurate

Multiple Choice

Which one of the following statements is the MOST accurate?

A) Under a fixed exchange rate, central bank monetary tools are powerless to affect the economy's money supply.
B) Under a flexible exchange rate, central bank monetary tools are powerless to affect the economy's money supply or its output.
C) Under a fixed exchange rate, fiscal policy tools are powerless to affect the economy's money supply or its output.
D) Under a fixed exchange rate, central bank monetary tools are powerless to affect the economy's money supply or its output.
E) Under a dirty float exchange rate, central bank monetary tools are powerless to affect the economy's money supply or its output.