Answer
(a) A--right, B--left , C--right
Work Step by Step
Since the position in A is increasing positively with time, this means that the velocity is in the positive (right) direction.
The position is decreasing in case of B with time, means that the velocity is in the negative direction(left direction).
The position again starts to increase at C, so we can say that the velocity in C is in the positive (right) direction.
