Multi-choice problem: Choose from the options at the end, and answer how do you do this: How do I staple pieces of paper together?

Choose your answer from:
[I] Crookedly, place paper between the teeth of stapler and press down firmly with your hand on the stapler to make it staple.
[II] Straightly, place paper between the teeth of stapler and press down firmly with your hand on the stapler to make it staple.
[II]