An X VsT Graph Is Drawn for a Ball Moving in One

Multiple Choice

An x vs.t graph is drawn for a ball moving in one direction.The graph starts at the origin and at t = 5 s the velocity of the ball is zero.We can be positive that at t = 5 s,

A) the slope of the curve is non-zero.
B) the ball has stopped.
C) the acceleration is constant.
D) the curve is at x = 0,t = 0.