Finish the following sentence with the best choice: How do I staple pieces of paper together?

Choices:
- Crookedly, place paper between the teeth of stapler and press down firmly with your hand on the stapler to make it staple.
- Straightly, place paper between the teeth of stapler and press down firmly with your hand on the stapler to make it staple.

Answer:
Straightly, place paper between the teeth of stapler and press down firmly with your hand on the stapler to make it staple.