Finish the following sentence with the best choice: Roughen up the smooth surface of a hanger

Choices:
- Slide a piece of fine grade sand paper over the edges of the hanger, until the hanger surface is no longer smooth
- Slide a piece of fine grade sand paper over the entire hanger, until the hanger surface is no longer smooth

Answer:
Slide a piece of fine grade sand paper over the entire hanger, until the hanger surface is no longer smooth