Write the next sentence in this paragraph:

Then he smears cement onto the floor and lies the tiles on top of it. He hammers the tiles a little to make them lie flat. then floor

OPTIONS:
[I] is placed on top of the tiles and elided.;
[II] is now finished and he wipes the tiles off making them shiny.;
[III] top he rotates around putting visible lines between the floors.;
[IV] works again and the floor is done.;
[II]