The nurse advises a postpartum patient not to give any water to her 1-month-old infant after breastfeeding. Which is the reason for this advice?

A. The infant's calorie consumption is increased by excess water: Water does not contribute calories, so giving it to a young infant can reduce appetite for breast milk and potentially decrease caloric intake. This is not the primary reason for avoiding water supplementation. B. The infant has sufficient fluid reserves, which prevent dehydration: Infants have limited fluid reserves and are at higher risk for dehydration than adults. Relying on water reserves is unsafe and not the reason behind the recommendation. C. The infant does not have any fluctuations in fluid balance: Infants frequently experience fluid shifts due to their high surface area-to-volume ratio and immature kidneys. Ignoring fluid balance is inaccurate and not the rationale for this advice. D. The breast milk contains enough water to hydrate the child: Breast milk provides adequate hydration as it is composed of approximately 88% water. Exclusive breastfeeding meets both the fluid and nutritional needs of a 1-month-old infant, making supplemental water unnecessary and potentially harmful.