An economy starts out in short-run and long-run equilibrium. If both short-run and long-run aggregate supply increase, so that the economy remains in equilibrium:
A. The real level of output will fall, and the price level will rise.
B. The real level of output will rise, and the price level will fall.
C. The real level of output will rise, and the price level will rise.
D. The aggregate demand curve will have to shift.
E. The real level of output will rise, and the nominal level will fail.