A Ball Is Projected Upward at Time T = 0

Multiple Choice

A ball is projected upward at time t = 0.0 s,from a point on a roof 60 m above the ground.The ball rises,then falls and strikes the ground.The initial velocity of the ball is 28.4 m/s.Consider all quantities as positive in the upward direction.At time t = 4.3 s,the acceleration of the ball is closest to:

A) zero
B) +5 m/s²
C) +10 m/s²
D) -5 m/s²
E) -10 m/s²