A nurse is reinforcing teaching with a caregiver about how to safely prepare formula for their 3-day-old newborn. Which of the following statements should the nurse include in the teaching?

Rationale: A. "Store ready-to-feed formula at room temperature for up to 4 hours.": Ready-to-feed formula should be used promptly or refrigerated if not used immediately. Leaving it at room temperature for up to 4 hours increases the risk of bacterial growth and contamination. B. "Warm the bottle of formula by immersing it in a container of warm tap water.": This is a safe and recommended method to gently warm formula without overheating or creating hot spots that could burn the infant’s mouth. C. "Keep open cans of concentrated formula uncovered and refrigerated.": Open cans of concentrated formula should always be covered to prevent contamination and should be refrigerated promptly after opening. D. "Discard any formula left in the bottle within 2 hours after beginning feeding.": Formula left in the bottle after feeding should be discarded within 1 to 2 hours to prevent bacterial growth that can cause illness in the infant. This practice helps ensure feeding safety.