The Theory of Aggregate Supply Is One of the Most

The theory of aggregate supply is one of the most controversial in macroeconomics because

A) modern models, while similar in their starting points, reach widely different results in explaining the AS-curve
B) economists cannot agree whether the Keynesian or the classical AS-curve is a better reflection of reality
C) economists cannot agree whether wages are completely flexible or rigid in the long run
D) economists cannot agree whether wages are completely flexible or rigid in the very short run
E) economists do not completely agree on the reasons for the slow adjustment of wages and prices after demand-side disturbances