Your class decides to build a circuit to make a light bulb shine. When you are finished, you have a setup with wires, a light bulb and a battery.
What role does the battery play in this circuit design?
A) The battery works as the system's wires.
B) The battery is the electrical power supply.
C) The battery is the circuit's main conductor.
D) The battery works as the system's electrical switch.
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