The furnace will overheat. The thermostat will become hot. The furnace will automatically turn on. The thermostat will give off a beeping sound.
I gave my students this multiple choice question: What happens when the temperature in the house is cooler than the temperature selected on the thermostat?

Only one answer is correct among these 4 choices:
- The furnace will overheat.
- The thermostat will become hot.
- The furnace will automatically turn on.
- The thermostat will give off a beeping sound.

Could you tell me which one is correct?

The furnace will automatically turn on.