Answer:
Option B , The net force is zero.
Explanation:
When all the forces in any surface are such that the net force at a point comes to be zero then the object either do not move or in case if it moves it moves with a constant acceleration or velocity.
In this case the speed is neither gained nor lost, which means that there is no change it the motion of the object thus, the net force acting on this object is zero.
Therefore, option B is correct.
