The Aggregate Supply Curve Is Upward Sloping Because

The aggregate supply curve is upward sloping because

A) higher product prices lag behind increases in resource costs.
B) higher prices eliminate much of the purchasing power of higher profits and wages.
C) higher prices result in greater nominal dollar purchases by consumers.
D) production costs tend to rise as an economy produces greater output,and higher prices are necessary to cover the costs.
E) lower prices stimulate suppliers to increase their sales volumes in order to maintain stable revenue levels.