When SRAS1 shifts to SRAS2​, the price level increases and the level of real GDP falls. What happens to the​ short-run Phillips curve when the​ short-run aggregate supply curve shifts​ (a supply​ shock)? A. It shifts up such that a given level of unemployment occurs at a lower price level. B. It shifts down such that a given level of unemployment occurs at a higher price level. C. It shifts down such that a given level of unemployment occurs at a lower price level. D. It shifts up such that a given level of unemployment occurs at a higher price level.