A Particle Moving Along the X Axis Has a Position

Multiple Choice

A particle moving along the x axis has a position given by x = 54t − 2.0t3 m. At the time t = 3.0 s, the speed of the particle is zero. Which statement is correct?

A) The particle remains at rest after t = 3.0 s.
B) The particle no longer accelerates after t = 3.0 s.
C) The particle can be found at positions x < 0 m only when t < 0 s.
D) All of the above are correct.
E) None of the above is correct.