Solution

In an inertial frame, an object or body accelerates only when a physical force is applied and in the absence of a net force, a body at rest will remain at rest and a body in motion will continue to more uniformly.
In Newtonian physics, only force in the options is the same. (Displacement is the same if one is talking about two positions at the same time.) Relative velocity (velocity difference) is also the same, as is acceleration. (Start with a Galilean transformation, such as x’ = x - Vt.) The coordinates y and z are the same, if x is the direction of the other frame’s motion. The time t is the same.

Hence (A) is the correct answer.