The Upward-Sloping Aggregate Supply Curve for an Economy Shows

The upward-sloping aggregate supply curve for an economy shows:

A) a negative relationship between the general price level and the level of aggregate output.
B) that the aggregate output firms are willing and able to supply at each price level falls as the price level rises.
C) when wages are completely flexible, aggregate supply is positively related to the price level.
D) there is some quantity of real output that firms are willing and able to produce and offer at each price level.