Task: Question Answering
Input (English): 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  
 (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.
Output (English): D