delivers great new flavor patented triple cleansing action guaranteed to make teeth sparkle certified by the American Dental Association
I gave my students this multiple choice question: Which statement on a toothpaste package best supports the claim of fighting cavities?

Only one answer is correct among these 4 choices:
- delivers great new flavor
- patented triple cleansing action
- guaranteed to make teeth sparkle
- certified by the American Dental Association

Could you tell me which one is correct?

certified by the American Dental Association