Finish the following sentence with the best choice: To make a piping tip from a soda bottle,

Choices:
- screw on the cap, cut a star shape into the cap with an X-acto knife, and then slice off the top of the bottle 1" from the end with the knife.
- screw on the cap, cut a star shape into the cap with a serrated knife, and then slice off the top of the bottle 1" from the end with the knife.

Answer:
screw on the cap, cut a star shape into the cap with an X-acto knife, and then slice off the top of the bottle 1" from the end with the knife.