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."