question: What decreases tooth decay?
choices.text: skin antigen water heat orange insulin osculum weater
choices.label: A B C D E F G H
fact2: Virtually all water contains fluoride.
combinedfact: Water decreases tooth decay.
formatted_question: What decreases tooth decay? (A) skin (B) antigen (C) water (D) heat (E) orange (F) insulin (G) osculum (H) weater