Finish the following sentence with the best choice: How to brush off the rust of a rusted tool.

Choices:
- Using a hairbrush, rub the brush along the rusted parts of the tool until the rust fall off.
- Using a toothbrush, rub the brush along the rusted parts of the tool until the rust fall off.

Answer:
Using a toothbrush, rub the brush along the rusted parts of the tool until the rust fall off.