A nurse is providing anticipatory instructions to the parents of a toddler regarding car seat safety. Which of the following statements suggest that the parents need more instruction?

A. This statement is correct as the harness straps should fit snugly and be positioned at or above the child's shoulders for proper safety. B. The middle of the back seat is indeed considered the safest position for a car seat. C. Checking the security of the car seat before every trip is essential for ensuring the child’s safety. D. Placing thick padding or blankets under the child is not recommended as it can interfere with the proper fit of the harness and increase the risk of injury in case of a collision.