Which Statement Is True When Rational Expectations Exist and There

Which statement is true when rational expectations exist and there is a change in monetary policy which is expected?

A) The change in monetary policy leads to a change in aggregate demand that leads to a temporary short-run equilibrium that is different from the long-run equilibrium.
B) The change in monetary policy leads to a simultaneous shift of the short-run aggregate supply curve.
C) The change in monetary policy lead to a simultaneous shift in the long-run aggregate supply curve.
D) The change in monetary policy does not change equilibrium in either the short-run or long-run.