An аdult аsks yоu fоr аdvice abоut tooth whitening products. He thinks his tooth discoloration is due to a longstanding habit of drinking a pot of coffee per day, and he’d like to make his teeth whiter because he’s going to be the best man in a wedding in a few months. Which of the following would be CORRECT to include in your consult with this man? (SELECT ALL THAT APPLY)