Cameron and Morgan are each holding a bar magnet with opposite poles facing each other. They walk in opposite directions until they stop feeling their magnet pull towards the other one What can they conclude about the distance between them when they stop feeling their magnets pull?

A. They are outside the magnetic field of their magnets.

B. The distance made the magnets' force stronger.

C. The magnetic field was weaker when they were close.

D. The magnetic fields are far enough apart to change direction.​