The recommended minimum number of grams of dietary fiber, G, needed each day for children aged 3 years and older is the determined by the child's age. Which is the correct interpretation of G(7) = 12?
a. A 3-year old should have less than 7 grams of the fiber eacg day
b. A 12-year-old should have less than 7 grams of the fiber each day
c. A 7 year old should have at least 12 grams of the fiber each day
d. A 12-year-old should have at least 7 grams of the fiber each day