Multi-choice problem: Continue writing the next sentence in this paragraph:

Then he shows how to use fans to ventilate the room. He takes a scour and begins to scour the wall paper. he

Options are:
[I] shows how to detail and process paper paper.
[II] then puts a towel on the back of the wall paper and wipes it off with his hand.
[III] uses a paint roller to soak the wall paper for easy removal.
[IV] straightens it out and removes the wax paper.
[III]