<human>: Objective: how to clean a garage floor

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
- Remove any moss or roots that have grown on exterior concrete. Spray the concrete. Cover the floor with a dusting of cleaner. Scrub the floor.    Rinse the concrete with clean water.
- Remove any moss or roots that have grown on exterior concrete. Spray the concrete. Cover the floor with a dusting of cleaner. Scrub the refrigerator    Rinse the concrete with clean water.
<bot>: Remove any moss or roots that have grown on exterior concrete. Spray the concrete. Cover the floor with a dusting of cleaner. Scrub the floor.    Rinse the concrete with clean water.