A nurse is teaching a newborn's parent to care for the umbilical cord stump. Which of the following instructions should the nurse include?

Choice A rationale: Petroleum jelly creates a moist environment that can delay the drying process and increase the risk of infection. The cord should be kept dry to facilitate sloughing. Choice B rationale: Daily washing with soap can irritate the site and prevent the stump from drying out. Current practice emphasizes keeping the area clean and dry without routine chemical application. Choice C rationale: Submerging the umbilical cord in bathwater can lead to infection or delayed healing. Sponge baths are recommended until the stump naturally detaches and the area is fully healed. Choice D rationale: Covering the cord with a diaper traps moisture and can lead to irritation from urine or stool. The diaper should be folded down to allow air circulation for drying.