Kim hires students at $90 a day to do housecleaning. She leases equipment that costs $100 a day. Suppose that Kim doubles the number of students she hires and doubles the amount of equipment that she leases. Describe Kim's long-run average cost curve if she experiences economies of scale. Question content area bottom Part 1 If Kim experiences economies of scale, her long-run average cost curve _______. A. shifts downward B.slopes downward slopes downward C. shifts upward D.slopes upward slopes upward E. is horizontal