A nurse is teaching the parent of an infant about car seat safety. Which of the following instructions should the nurse include?

A. "Fasten the harness over your infant's winter coat.": Harnessing over bulky clothing prevents the straps from fitting snugly, increasing the risk of injury in a crash. Infants should be secured without bulky coats, using a blanket over the harness if warmth is needed. B. "Pad the backrest of the car seat with a thick blanket before securing your infant.": Adding padding can interfere with the proper positioning and safety design of the car seat. Only manufacturer-approved inserts should be used to maintain safety standards. C. "Keep the car seat in a rear-facing position until your infant is 2 years old.": The rear-facing position offers the best protection for the infant’s head, neck, and spine in a collision. Safety guidelines recommend rear-facing until at least age 2, or until the child outgrows the seat’s height and weight limits. D. "Ensure the airbag is activated if the car seat is in the front passenger seat.": Infants should never be placed in a front seat with an active airbag, as deployment can cause fatal injuries. Car seats should always be secured in the back seat whenever possible.