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?

"Store ready-to-feed formula at room temperature for up to 4 hours."

"Warm the battle of formula by immersing it in a container of warm tap water."

"Keep open cans of concentrated formula uncovered and refrigerated."

"Discard any formula left in the bottle within 2 hours after beginning feeding”