Which of the Following Statements Is Correct

Multiple Choice

Which of the following statements is correct?

A) The classical aggregate supply schedule is horizontal while the Keynesian aggregate supply schedule slopes upward to the left.
B) The classical aggregate supply schedule is vertical while the Keynesian aggregate supply schedule is horizontal.
C) The classical aggregate supply schedule is vertical while the Keynesian aggregate supply schedule slopes upward to the right.
D) The classical aggregate supply schedule slopes upward to the right while the Keynesian aggregate supply schedule is vertical.
E) none of the above are correct.