Finish the following sentence with the best choice: How to attach clay pots together?

Choices:
- Use a nail and nut to pass through the hole at the bottom of the clay pot and use a washer to block the holes completely both inside and outside the pots. Align the two smaller clay pots together and connect with a butterfly nut.
- Use a screw and nut to pass through the hole at the bottom of the clay pot and use a washer to block the holes completely both inside and outside the pots. Align the two smaller clay pots together and connect with a butterfly nut.

Answer:
Use a screw and nut to pass through the hole at the bottom of the clay pot and use a washer to block the holes completely both inside and outside the pots. Align the two smaller clay pots together and connect with a butterfly nut.