Which best explains why it is important that the camera stays stationary when you were taking pictures for stop motion films

A. All filming requires a Camera to be stationary when filming.
B. Movement of the camera means that the background will not lineup.
C. Different camera techniques like close-ups can be used with live action.
D. Animation cels must be perfectly laid over the background and photographed.

D. Animation cels must be perfectly laid over the background and photographed.