A student sets up an experiment to investigate particle motion and heat transfer. He attaches a paperclip to an iron rod with wax. He suspends the iron rod above a spirit lamp and lights the spirit lamp to heat the rod. The setup is shown below. image A. The particles in the rod move towards the heat as the rod is heated by the spirit lamp. The movement of these particles causes the wax to become heated and melt, letting the paperclip fall to the table. B. The particles in the rod move away from the heat as the rod is heated by the spirit lamp. The movement of these particles causes the wax to become heated and melt, letting the paperclip fall to the table. C. The particles in the rod nearest to the spirit lamp begin to move faster when heated. These particles collide into nearby particles, slowly transferring heat energy along the rod to reach the wax. This causes the wax to melt, letting the paperclip fall to the table. D. The particles in the rod nearest to the spirit lamp begin to move slower when heated. These particles form a rigid grid with nearby particles, slowly transferring heat energy along the rod to reach the wax. This causes the wax to melt, letting the paperclip fall to the table.