The nurse is planning to teach infant care and preventive measures for sudden infant death syndrome (SIDS) to a group of new parents. Which information is most important for the nurse to include?

Choice A reason: This is correct because a firm mattress reduces the risk of suffocation and rebreathing of carbon dioxide, which are associated with SIDS.Choice B reason: This is incorrect because propping the infant with a pillow can cause the infant to slide down and suffocate or obstruct the airway.Choice C reason: This is incorrect because swaddling the infant in a blanket can cause overheating, which is a risk factor for SIDS.Choice D reason: This is incorrect because placing the infant in a prone position can increase the risk of SIDS by impairing gas exchange and thermoregulation.