Which of the Following Statements Is True Regarding Use of Dentifrices

Which of the following statements is true regarding use of dentifrices in the United States?

A) Nearly 75% of all dentifrices or toothpastes available in the United States contain some form of fluoride,but the remaining 25% of these products do not.
B) Some products contain triclosan 0.3%,as well as fluoride,but these products do not carry ADA approval for claimed effects against gingivitis.
C) Studies have shown that children between the ages of 10 and 15 years who brush three times daily with a fluoride dentifrice showed no reduction in the decayed-missing-filled rate compared with those that only brush once a day.
D) Children should use a pea-sized amount of toothpaste to minimize fluoride ingestion.