What are the manufacturers of medical device magnets in Jiangsu?

When the magnet moves from A to B, the magnetic flux of the coil first increases and then decreases. Because the direction of the magnetic induction line passing through the coil is unchanged, we can know from Lenz's law that the direction of the induced current will be opposite.

According to the relative motion angle of Lenz's law, there are: "Magnets repel each other at near time and attract each other at far time". When the magnet approaches, the coil is subjected to a horizontal ampere force to the right; When away, the coil is subjected to horizontal ampere force to the right, so the induced current is subjected to the same force direction, so C is correct and ABD is wrong;

So choose C.