For children considered to be at high risk of caries and who live in areas with water supplies containing less than 0.3 ppm

For children considered to be at high risk of caries and who live in areas with water supplies containing less than 0.3 ppm:

A. 0.25 mg F per day age 6 months to 3 yrs.

B. 0.5 mg f per day from 3-6 yrs.

C. 1 mg per day more than 6 yrs.

d. All of above***