What happens next in this paragraph?

A couple of men are working inside a house. They scrape a ceiling clean, then apply spackling. they
Options are:
[a]. use a back scratcher to wipe it clean with a towel.
[b]. replace the tiles with a new one.
[c]. place wetness and plaster onto the ceiling over the plaster.
[d]. cover the entire ceiling with the spackling.
[d].