Finish the following sentence with the best choice: How to sharpen knitting needles?

Choices:
- place the wooden knitting needles in a pencil sharpener and sharpen them smooth with a pencil sharpener
- place the wooden knitting needles in a pencil sharpener and sharpen them smooth with sand paper

Answer:
place the wooden knitting needles in a pencil sharpener and sharpen them smooth with sand paper