take long showers run a half full dishwasher let the water run while washing the dishes turn off the water while brushing your teeth
I gave my students this multiple choice question: Of the choices listed, what is the best way to conserve water in a home?

Only one answer is correct among these 4 choices:
- take long showers
- run a half full dishwasher
- let the water run while washing the dishes
- turn off the water while brushing your teeth

Could you tell me which one is correct?

turn off the water while brushing your teeth