Mark the correct statements for a particle going on a straight line:
A. If the velocity and acceleration have opposite sign, then the object is slowing down
B. If the position and velocity have opposite sign then the particle is moving towards the origin.
C. If the velocity is zero at an instant then the acceleration should also be zero at that ibnstant.
D. If the velocity is zero for a time interval, then the acceleration is zero at any instant within the time interval.
