8. The Phillips Curve depends on which of the following assumptions: A. The aggregate demand curve never shifts B. The aggregate supply curve never shifts C. The price level never changes D. Long-Run Aggregate Supply increases over time 9. According to what we learned in class, which of the following is true of long run equilibrium GDP and price level when aggregate demand shifts to the right? A. Long run equilibrium GDP increases and the price level increases B. Long run equilibrium GDP increases and the price level is unchanged C. Long run equilibrium GDP is unchanged and the price level is unchanged D. Long run equilibrium GDP is unchanged and the price level increases.