Finish the following sentence with the best choice: how do you file your nails down?

Choices:
- use a nail clipper and cut them shorter.
- use a nail filer, and put it against the tips of your nails. rub it back and forth on the nail to your desire.

Answer:
use a nail filer, and put it against the tips of your nails. rub it back and forth on the nail to your desire.