A nurse is teaching a group of parents about expected development of gross motor skills during infancy. The nurse should teach that the following developmental tasks are expected to occur in what order? (Move the steps into the box on the right, placing them in the order of performance. Use all the steps.)

Rationale: A. Rolls from back to side: This is typically the first gross motor milestone among the listed options and usually occurs around 4 months of age. It marks early trunk and upper body control development. B. Rolls from back to abdomen: Rolling from back to abdomen requires more strength and coordination and generally occurs around 5 to 6 months of age, following the ability to roll to the side. C. Sits steadily unsupported: Infants begin sitting without support around 7 to 8 months, once they develop adequate trunk and head control. This milestone represents a major progression in balance and posture. D. Changes from prone to sitting: Transitioning from a prone to a sitting position typically develops around 9 to 10 months. It involves coordinated control of the arms, trunk, and legs and reflects advanced gross motor skill development.