The correct answer is: (b) The object must be stationary.
Work Step by Step
The correct answer is: (b) The object must be stationary. If an object is in translational equilibrium, then the net force on the object is zero. Therefore the acceleration is zero. If the object is moving then it continues moving at the same speed in the same direction. If the object is at rest, then it stays at rest. The object could be moving or it could be stationary.