The figure shows the velocity \( (v) \) of a particle plotted against time \( (t) \). (a) The p...

The figure shows the velocity \( (v) \) of a particle plotted against time \( (t) \).

(a) The particle changes its direction of motion at some point
(b) The acceleration of the particle remains constant
(c) The displacement of the particle is zero
(d) The initial and final speeds of the particle are the same