A nurse is educating a parent of a child who has a high lead level about the importance of foods high in iron and calcium. Which of the following statements by the parent indicates a correct understanding of the nurse's teaching?

A. Processed foods are generally low in iron and calcium and do not help reduce lead absorption. B. Dairy products are a good source of calcium and should not be limited unless directed for another medical reason. C. Fruits and vegetables (especially leafy greens and iron-rich produce) provide important sources of iron and calcium, which compete with lead for absorption and help lower lead toxicity. D. Soda does not contain calcium and may worsen nutritional status, interfering with healthy intake.