Single/multi-choice problem: Which of the following solutions is better for the following goal:
How to sweep the floors in a house?

Options are:
- With a broom, sweep detritus into a pile in corner of the room. Sweep the pile of detritus into the dustpan. Repeat the process in one room..
- With a broom, sweep detritus into a pile in one corner of the room. Sweep the pile of detritus into the dustpan. Repeat the process in every room..
With a broom, sweep detritus into a pile in one corner of the room. Sweep the pile of detritus into the dustpan. Repeat the process in every room.