Question: Wash your car.
Option 0: Using a bucket of dirty water and a sponge, immerse the sponge in the water and rub it all over the car. Use a hose to rinse the car with water.
Option 1: Using a bucket of soapy water and a sponge, immerse the sponge in the water and rub it all over the car. Use a hose to rinse the car with water.
Answer: 1