The long-run aggregate supply curve is:
Group of answer choices
a. Horizontal because it shows that in the long run a higher price level will not bring about higher output.
b. Vertical because it shows that in the long run a higher price level will not bring about higher output.
c. Horizontal because it shows that in the long run higher output will not bring about a higher price level.
d. Vertical because it shows that in the long run higher output will not bring about a higher price level.
