A nurse is assessing a patient who has been admitted with shortness of breath. Which of the following should be the nurse's priority intervention after hearing wheezing upon auscultation of the patient's lungs?

Rationale: A. Supplemental oxygen may improve oxygenation, but it does not relieve wheezing, which is caused by airway constriction. Oxygen alone does not treat the underlying problem. B. Elevating the head of the bed can help ease breathing but is a supportive measure, not the priority for acute airway obstruction. C. Administering a bronchodilator is the priority because wheezing indicates bronchospasm and narrowed airways. A bronchodilator (such as albuterol) directly relaxes bronchial smooth muscle, improves airflow, and relieves wheezing. D. Deep breathing and coughing may help mobilize secretions but will not be effective until the airways are opened with a bronchodilator.