In the Long Run, the Nominal Exchange Rate

In the long run, the nominal exchange rate

A) is a monetary phenomenon, determined by the quantities of money in two countries.
B) is fixed by world central banks, as indicated by the fixed exchange rate system.
C) is not related to the real exchange rate, since the real exchange rate is the true value of currencies.
D) will not change if prices in one country change, since prices are nominal variables.