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. A bronchodilator should be given before postural drainage to help open the airways. B. The procedure should be done 2 to 4 times daily, not just twice a day. C. A cupped hand, not a flat hand, should be used for percussions to loosen mucus. D. Postural drainage should be done before meals to reduce the risk of vomiting or aspiration.