Which of the following lists contains foods that are reliable dietary sources of copper?

• A. Refined sugar products, clear fruit juices, and distilled water, which are typically concentrated sources of copper after processing
• B. Only dairy milk and egg whites, since copper is stored primarily in these animal secretions rather than in muscle or organ tissues
• C. Organ meats (e.g., liver), shellfish (e.g., oysters), nuts and seeds, and whole grains
• D. Raw lettuce, purified protein isolates, and vitamin supplements that exclusively target iron and not copper intake

Answer: (C)