A nurse is reinforcing discharge teaching about car seat safety with the guardian of a newborn. Which of the following information should the nurse include in the teaching?

"Place a rolled blanket behind the newborn's neck during extended trips."

"Position the newborn's car seat at a 45° angle."

"Position the retainer clip at the level of the newborn's umbilicus."

"Place the newborn's car seat in a forward-facing position."