Which of the Following Is True If Marginal Costs Increase

Multiple Choice

Which of the following is true if marginal costs increase at a slow rate as output increases?

A) The short-run aggregate supply curve is relatively steep.
B) The short-run aggregate supply curve becomes vertical.
C) The short-run aggregate supply curve is relatively flat.
D) The long-run aggregate supply curve becomes horizontal.
E) The long-run aggregate supply curve becomes downward sloping.