Studies of Mental Rotation Have Shown All of the Following

Studies of mental rotation have shown all of the following EXCEPT ______.

A) the amount of time taken to decide if two drawings are the same or a mirror image reversal is proportional to the angle of rotation required
B) the time taken to decide if two drawings are the same is equal for rotations within the picture plane (two-dimensional rotations) and rotations in depth (three-dimensional rotations "forward" or "backward")
C) mental rotations are faster when done in a clockwise direction than in a counterclockwise direction
D) the rate of mental rotation is the same for simple and complex geometric figures