A nurse is reinforcing instructions about car-seat use with the parents of a newborn who is preparing for discharge. Which of the following Instructions should the nurse include?

Rationale: A. "Swaddle the newborn before securing the clips.": Swaddling before placing the newborn in the car seat is unsafe because it can prevent proper restraint and increase the risk of injury during a crash. The newborn should be secured directly by the harness straps. B. "Add a soft head support in the car seat if necessary.": Adding aftermarket soft head supports can interfere with the car seat’s harness system and safety performance. Only manufacturer-approved accessories should be used. C. "Secure the straps across the newborn's chest at the level of their armpits.": The harness straps should be positioned at or just below the newborn’s shoulders, with the chest clip placed at the armpit level to ensure optimal restraint and prevent movement during sudden stops. D. "Ensure that the car seat is positioned at a 90 degree incline.": The car seat should be reclined at approximately a 45-degree angle to prevent the newborn’s head from falling forward and obstructing the airway during travel.