If the Price Level Kept Decreasing,the Short-Run Aggregate Supply Curve

Multiple Choice

If the price level kept decreasing,the short-run aggregate supply curve would get flatter because

A) all the unemployed would eventually be hired.
B) we could hire any and all resources at the going rate without increasing prices or the price of inputs..
C) the rate at which capacity can be expanded increases indefinitely.
D) the long-run aggregate supply curve is horizontal.