While working on a design for a new roller coaster, the designers noticed that the roller coaster cars did not have enough energy to complete the loop. How should they adjust the track so that the cars can complete the loop? A. Decrease the height of the hill before the loop because that would decrease the kinetic energy of the cars.

B. Increase the height of the hill before the loop because that would decrease the kinetic energy of the cars.

C. Increase the height of the hill before the loop because that would increase the kinetic energy of the cars.

D. Decrease the height of the hill before the loop because that will increase the kinetic energy of the cars.