Explanation/Reference:
Explanation:
(A) Consistent weight gain, even if it is slow, is an indication that the child is eating and digesting sufficient calories. (B) Recording how much the child eats is useful, but it is not an indicator of how well his body is using the foods consumed. (C) Counting calories will indicate how much he is eating, but it will not reflect whether or not the foods are properly digested. (D) Keeping track of the enzyme intake will indicate compliance with medication but not whether the child is getting sufficient calories.