A nurse is teaching a client who is postpartum about caring for their newborn's umbilical cord. Which of the following instructions should the nurse include?

The correct answer is A: Wash the area around the base of the cord with water. This instruction is essential for maintaining hygiene and preventing infection. Washing the area with water helps keep it clean without introducing potential irritants or pathogens. It is important to avoid using alcohol or other substances that may delay healing or cause irritation. Choices B, C, and D are incorrect. B: Covering the cord with the upper edge of the diaper can trap moisture, leading to infection. C: Reporting minor bleeding when the cord's stump falls off is normal and expected. D: Applying petroleum jelly can create a moist environment that promotes bacterial growth.