1. Business is booming at the local McDonald's restaurant. It is contemplating adding a new grill and french-fry machine, but the day supervisor suggests simply hiring more workers. How should the manager decide which alternative to pursue? a. Compare the cost of the new grill and french-fry machine to the cost of additional workers. (which one is cheaper?) b. Compare the additional output of the new grill and french-fry machine to the additional output of more workers. (which one produces more?) c. Compare the additional output per dollar spent on the new grill and french-fry machine to the additional output per dollar spent on additional workers. d. None of the above