Finish the following sentence with the best choice: To sharpen a knife,

Choices:
- use a wet stone and rub it along the length of the blade at a 45 degree angle to the blade edge.
- use a wet stone and rub it along the length of the blade perpendicular to the blade edge.

Answer:
use a wet stone and rub it along the length of the blade at a 45 degree angle to the blade edge.