How does electricity turn into light in a common lightbulb?
A. Electricity strikes the metal particles of the filament in a lightbulb. Some of the metal particles become gases and turn into light.
B. Electricity cools down the filament in the bulb to a very low temperature. At that temperature, the metal becomes bright and gives off light.
C. Electricity heats up the filament in the bulb to a very high temperature. At that temperature, the metal becomes bright and gives off light.
D. Electricity strikes the metal particles of the filament in a lightbulb. Some of the metal particles are ripped off from the metal and turn into light.