A nurse is Instructing the mother of a toddler who has iron-deficiency anemia to increase iron in the child's diet in addition to the prescribed iron supplement. Which of the following foods should the nurse recommend?

A. Bananas are not a significant source of iron; they provide potassium and other nutrients but are not helpful for increasing iron levels. B. Cucumbers are low in iron and do not contribute to improving iron-deficiency anemia. C. Tuna fish is a good source of iron, as well as providing protein and omega-3 fatty acids, making it a suitable recommendation for increasing iron in the child's diet. D. Skim milk is low in iron and excessive dairy can inhibit iron absorption, so it is not advisable for increasing dietary iron.