Which age group should use a rear-facing child safety seat?

Answer: A — Infants

The correct choice is infants, as rear-facing child safety seats are specifically designed to provide optimal protection for this age group. Infants have delicate necks and spines that are still developing, and a rear-facing seat offers crucial support during a crash. In the event of a collision, the rear-facing position allows the seat to absorb the impact and distribute the force over a larger area of the infant's body, significantly reducing the risk of severe injuries. Additionally, safety guidelines from organizations such as the American Academy of Pediatrics recommend that children remain in rear-facing seats until they reach the upper weight or height limits specified by the seat manufacturer, which typically accommodates infants and some toddlers. This ensures continued protection as their bodies grow and develop. Therefore, utilizing a rear-facing seat for infants represents best practices for safety in vehicle travel.