A nurse is reinforcing teaching about car seat safety with a parent of a newborn. Which of the following statements by the parent indicates an understanding of the teaching?

I can turn the car seat so it faces forward when my baby weighs 15 pounds.

I will place a thick soft pad behind my baby's back.

I should place my baby in the car seat at a 90-degree angle.

I will place the retainer clip at the level of my baby's armpit.