Finish the following sentence with the best choice: How do you know you'll need to replenish your staple supply?

Choices:
- Mark one end of 20 or so staples with a red sharpie pen. Load them so that red ones will be used at the end. When your stapler starts punching red, you need to buy staples.
- Mark one end of 20 or so staples with a red sharpie pen. Load them so that red ones will be used at first. When your stapler starts punching red, you need to buy staples.

Answer:
Mark one end of 20 or so staples with a red sharpie pen. Load them so that red ones will be used at the end. When your stapler starts punching red, you need to buy staples.