Finish the following sentence with the best choice: How do I vibrate the concrete when pouring a concrete marble countertop?

Choices:
- You can use a commercial concrete vibrator or you can rap a utility knife along the bottom and sides of the mold
- You can use a commercial concrete vibrator or you can rap rubber mallets along the bottom and sides of the mold

Answer:
You can use a commercial concrete vibrator or you can rap rubber mallets along the bottom and sides of the mold