Write the next sentence in the following story.

How to clean a viscose rug
Run your hand along the rug to get the direction of the nap.
The nap or pile is the natural direction that the rug's fibers run. Running your hand across the surface of the rug will give you an indication to how the rug's fibers lay.

Possible answers:
[I] File this based on how thick the rug is or how dense the fibers are. Place your barrel gun along the nap.
[II] Runs running from left to right are the most common. More detailed information on the rug you will gain from the next section.
[III] Agitating the rug against the pile can loosen the rug's fibers and distort your rug. Push a carpet sweeper in the direction of the nap.
[IV] Look at the creases you've noticed. Trace these creases with a pencil.. The answer should be
[III]