Finish the following sentence with the best choice: Make your own potting soil.

Choices:
- Go outside and dig up some dirt. Carefully spread thin on a cookie sheet and bake for 10 minutes. This kills all germs.
- Go outside and dig up some dirt. Carefully spread thin on a cookie sheet and let sit in sun for 10 minutes. This kills all germs.

Answer:
Go outside and dig up some dirt. Carefully spread thin on a cookie sheet and bake for 10 minutes. This kills all germs.