A nurse is providing teaching to the parent of an infant about car seat safety. Which of the following statements by the parent indicate an understanding of the teaching?

I should place the shoulder harness above the level of my baby's shoulders.

I should place the car seat rear-facing until my baby is 2 years old.

I will place the retainer clip over my baby's abdomen.

I should position my baby at a 30-degree angle in the car seat.