Which of the Following Shifts the Short-Run Aggregate Supply Curve

Multiple Choice

Which of the following shifts the short-run aggregate supply curve right?

A) both an increase in the price level that is greater than expected and an increase in the expected price level.
B) an increase in the price level that is greater than expected,but not an increase in the expected price level.
C) an increase in the expected price level,but not an increase in the price level that is greater than expected.
D) neither an increase in the price level that is greater than expected nor an increase in the expected price level.