A student performs an activity using a sheet of paper, a magnet, and a steel ball. The image shows the setup. The student observes that the steel ball sticks to the magnet even though the paper is between them. Which factor leads to the attraction of the ball to the magnet?

A. The magnet exerts a force on the ball.

B. The magnet attracts the paper, which pulls the ball..

C. The paper exerts a force on the ball, which pulls the ball toward the magnet.

D. The size of the ball attracts the ball toward the magnet.