Second one I presume to be A. See the box attached to the side of the is positioned left initially then up, right and then back to up, which I believe indicates that it will move left again. As for the arrow I believe that will move back to pointing up. Another thing which indicates it is A is the color of the circles. the first box had 2 white circles, the second had 2 gray, third 2 white and last 2 gray. This indicated the last box should have 2 white. In the end, the only answer choice which matches my observations would be A.