Alabel of a food that provides 15% of daily value of a given nutrient per serving can carry a claim about that nutrient that says?

When a label of food provides 15% of daily value of a given nutrient per serving, then it is considered as a good source of diet. Moreover, researchers are more accurate in determining what people must consume to achieve optimal weight and good health. Therefore a good source of food that has good quality will help promote weight loss and prevent weight gain.

answer; /// i believe that the correct answer is (c) the concentration of active ingredients in a medication