A nurse is caring for a child who has cystic fibrosis and requires postural drainage. Which of the following actions should the nurse take?

A. Postural drainage should ideally be done after meals to reduce the risk of vomiting. B. Holding the hand flat during percussions helps distribute the force evenly and prevents injury to the child’s ribcage. C. The procedure may need to be performed more than twice daily, depending on the child's condition. D. A bronchodilator is typically administered before the procedure, not after, to help open the airways and improve the effectiveness of drainage.