A Tennis Ball Is Thrown Upward at an Angle from Point

Multiple Choice

A tennis ball is thrown upward at an angle from point A. It follows a parabolic trajectory and hits the ground at point D. At the instant shown, the ball is at point B. Point C represents the highest
-At which point is the velocity vector changing most rapidly with time?

A) A
B) B
C) C
D) D
E) It is changing at the same rate at all four points.