Finish the following sentence with the best choice: How to get teeth professionally whitened.

Choices:
- Your Dentist will place bleaching gel in a tray and fit in your mouth against your teeth, then use a laser for 30 minutes or less to keep teeth warm.
- Your Dentist will place bleaching gel in a tray and fit in your mouth against your teeth, then use a laser for 30 minutes or less to activate gel and whiten quickly.

Answer:
Your Dentist will place bleaching gel in a tray and fit in your mouth against your teeth, then use a laser for 30 minutes or less to activate gel and whiten quickly.