A ball of mass 1.2 kg is attached to a 0.80 m long string. It is moving horizontally in a clockwise direction, 4.0 m above the ground, with a speed of 19.0 m/s. The centripetal acceleration of the ball is
A) 54.0 m/s²
B) 62.5 m/s²
C) 71.8 m/s²
D) 83.6 m/s²