The Aggregate Expenditure Line, Along with the 45-Degree Line, Determines

Multiple Choice

The aggregate expenditure line, along with the 45-degree line, determines equilibrium.What assumption is this model based on?  

A)  that production is constant 
B)  that production is constant and at the full employment level of GDP 
C)  that producers are ready to supply whatever amount of output is demanded at the existing price level 
D)  that producers will supply more at higher prices than they will at lower prices