A nurse is reinforcing teaching about infant car seat use with a group of new parents. Which of the following instructions should the nurse include in the teaching?

Choice A reason: Placing a folded blanket to pad the back of the infant's head is not recommended, as it can interfere with the proper fit of the car seat harness and potentially be a safety hazard. Choice B reason: This statement is correct. Infant car seats should be positioned at a 30-degree angle to provide optimal support for the infant's head and neck, as well as to prevent airway obstruction. Choice C reason: While car seats with a four-point harness do exist, a standard infant car seat typically has a five- point harness system. Choice D reason: The retainer clip should be positioned at the level of the infant's armpits to ensure that the harness is snug and secure.