Finish the following sentence with the best choice: To make sure an envelope doesn't go through machine sorting.

Choices:
- Put an "additional ounce" stamp on the envelope as that will stop it from going through the machine.
- Write on the envelope (do not machine) or (fragile) to avoid it being put in the machine.

Answer:
Write on the envelope (do not machine) or (fragile) to avoid it being put in the machine.