Finish the following sentence with the best choice: How to sand the edges of the wooden boards.

Choices:
- Using sandpaper, go over the panels that are rough with the paper. Keep rubbing until the panels are smooth.
- Using sandpaper, go over the edges that are rough with the paper. Keep rubbing until the edges are smooth.

Answer:
Using sandpaper, go over the edges that are rough with the paper. Keep rubbing until the edges are smooth.