Final answer:
The guardian understands that the car seat harness should be positioned 1 inch above the baby's shoulders.
Step-by-step explanation:
The correct answer is b) "I should position the car seat harness 1 inch above my baby's shoulders: True/ False". This statement indicates an understanding of the teaching on car seat use. The guardian recognizes the importance of properly positioning the car seat harness to ensure the safety and proper fit for the infant. Positioning the harness 1 inch above the baby's shoulders helps to secure the baby in the car seat and prevent any potential injuries in the event of a car accident.