A nurse in a clinic is teaching the mother of a 4-month-old infant who has been breastfed. The mother plans to switch her infant to an iron-fortified formula. Which of the following should be included in the teaching?

A. Iron facilitates development of vision in infants: Iron is primarily involved in hemoglobin formation and oxygen transport rather than direct visual development. Vision development is more closely linked to nutrients like vitamin A and DHA. B. Iron facilitates growth of bones in infants: Bone growth is mainly supported by calcium, phosphorus, and vitamin D. While iron supports overall growth by preventing anemia, it is not a key nutrient in bone development. C. Iron stores in infants begin to deplete: By around 4 to 6 months of age, the iron stores infants acquired in utero begin to diminish, especially in breastfed infants. Introducing iron-fortified formula helps prevent iron deficiency anemia. D. Iron is poorly absorbed in infants: Iron from breast milk is generally well-absorbed, and iron from fortified formulas is also absorbed adequately to meet the infant's needs once their natural stores begin to decline. The issue is the depletion of the initial stores, not inherently poor absorption of dietary iron in healthy infants.