The Aggregate Supply Curve Relates the Price Level to the Quantity

The aggregate supply curve relates the price level to the quantity of output that firms would like to produce and sell, given the assumption that

A) all firms are price setters.
B) technology and the prices of all factors of production do not remain constant.
C) technology and the prices of all factors of production remain constant.
D) unit costs remain constant.
E) all firms are price takers.