Write the next sentence in this paragraph:

They turn the vacuum on and begin vacuuming the floor. They take the attachment hose off and vacuum the base boards and stairs. they

Choices:
1). go back and forth checking for any dents or holes.
2). not only sit on the floor vacuuming in the spot set, they work on the stairs as well.
3). take the filter out and empty it.
4). move the vacuum up and down the wooden floors.
3).