A nurse is caring for a 4-month-old infant and understands that which of the following milestones would indicate to the nurse that the infant is developing normally?

Rationale: A. Rolling over from front to back typically emerges around 4 months of age, indicating normal gross motor development. B. Holding own bottle for feedings usually occurs around 6 months, later than 4 months. C. Bobbing the head when sitting is characteristic of 2–3 months; by 4 months, the infant should have better head control. D. Holding hands in a fist in front of the face is common in newborns (0–2 months) and is a primitive reflex that decreases by 4 months.