Two cereal products list %DV on their labels for fiber and iron. Cereal A: Fiber 20% DV, Iron 15% DV. Cereal B: Fiber 12% DV, Iron 25% DV. For a consumer who wants to maximize fiber but still get some iron, which cereal is more nutrient-dense for fiber and which for iron, and what is the appropriate label-based interpretation?

• A. Cereal A is more nutrient-dense for fiber (20% vs 12%), and Cereal B is more nutrient-dense for iron (25% vs 15%); %DVs let you compare relative nutrient density per serving between foods.
• B. Cereal B is more nutrient-dense for both fiber and iron because a lower fiber %DV always indicates better fiber quality, and higher iron %DV implies lower bioavailability.
• C. Cereal A is better for iron because fiber and iron interact and a higher fiber %DV always predicts higher iron content despite the percent shown for iron.
• D. Both cereals are identical in nutrient density because %DVs are not comparable across products unless serving sizes are identical by weight, which labels never standardize.

Answer: (A)