If PPP Theory Were Perfectly Valid,movements in Nominal Exchange Rates

If PPP theory were perfectly valid,movements in nominal exchange rates

A) would never occur,so that inflation differentials would cause fluctuating real exchange rates.
B) would be amplified by inflation differentials into wider movements of real exchange rates.
C) would counteract inflation differentials and create equal movements in the real exchange rates.
D) would be matched by inflation differentials in such a way that real exchange rates never change.