A 4-year-old child with a history of cystic fibrosis (CF) presents to the clinic for a routine follow-up. The parents report that the child has had an increase in productive cough, wheezing, and shortness of breath over the past few days. Upon examination, the child has clubbed fingers, and chest auscultation reveals decreased breath sounds. Given these findings, which of the following interventions should the nurse prioritize to manage the child's condition and prevent further respiratory complications?

A. Nutrition is important in CF because malabsorption is common, but addressing malnutrition is not the immediate priority when the child is experiencing respiratory compromise. Nutritional interventions are secondary to airway management. B. Inhaled corticosteroids can help reduce chronic airway inflammation, but they do not remove existing mucus or immediately improve airflow. They are part of long-term management rather than urgent treatment during an exacerbation. C. CPT is the cornerstone of CF management, particularly during exacerbations. Techniques such as percussion, postural drainage, and vibration help mobilize thick mucus, improve airway clearance, enhance oxygenation, and reduce the risk of infection and further lung damage. Immediate airway clearance is critical for symptom relief and prevention of respiratory complications. D. Adequate hydration can support mucus thinning but is not sufficient alone to manage an acute pulmonary exacerbation. It is adjunctive, supporting other interventions like CPT and medications.