Question: A student used two long wires to connect a lightbulb to a battery. The student noticed that as soon as the circuit was complete, a nearby compass started to point in a direction other than north. The compass pointed in a different direction because it was reacting to the

  Options: 
 A. heat produced by the lightbulb.
 B. light produced by the lightbulb.
 C. electric field produced by the battery.
 D. magnetic field produced by the electric current.
Answer: D