You are presented with the quiz "What happens when incandescent bulbs get hot" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "an incandescent light bulb converts electricity into light by sending electricity through a filament" and "an incandescent material is so hot that it glows, producing light". 

So, what's the best answer to the question?


 

    They glow       