In the Classical Model, It Is Thought That the Long-Run

In the classical model, it is thought that the long-run:

A) and short-run aggregate supply curves are both upward sloping.
B) aggregate supply curve is vertical and the short-run aggregate supply curve is upward sloping.
C) and short-run aggregate supply curves are both vertical.
D) aggregate supply curve is upward sloping and the short-run aggregate supply curve is vertical.