How did the steel ball that flew out move compared to the steel ball that rolled toward the magnet?
I

The answer to this question is given below in this explanation section.

Explanation:

If you place a row of several steel balls on a track and let ball strike it and one end of the row,then the last ball at the other end will fly off,corresponding to the income impulse.All the other balls will remain at rest.This experiment is well known from the newton cradle toy,However you world be you surprise if the last ball in the row shot away like a bullet,even through the first ball.only seemed to have a very moderate velocity.This would not seem consistent with the law of the conservation of energy.

The effect is so surprising that one guesses it might be a trick and you would be right: one or more of the similar looking balls are in fact magnetic.

The first strike approaching from the left hand is from a non magnetic steel ball which will be strongly accelerated through the magnetic balls and thrust with a relatively high velocity on the row of resting balls.

the answer would be c