If Rational Expectations Theory Is Correct, Then Any Increase in Aggregate

If rational expectations theory is correct, then any increase in aggregate demand caused by announced expansionary policies

A) leads to a short-run increase in real output but no long-run increase.
B) causes the inflation rate to fall.
C) is offset by rising inflationary expectations, causing the short-run aggregate supply curve to immediately shift to the left.
D) is offset by rising inflationary expectations, causing the short-run aggregate supply curve to slowly shift to the left.