A 60 kg skier with an initial velocity of 12 m/s coasts up a hill. At the top of the hill, the skier is traveling at 9.75 m/s. Assuming there is no friction in the skis, how high was the hill? (1 point)
A. 7.35 m
B. 2.5 m
C. 10 m
D. 0.25 m