The Nurse Is Planning Care for a Patient with Chronic

The nurse is planning care for a patient with chronic lung disease.The patient is wheezing, with a HR of 130 and respiratory rate of 26 per minute; is using his accessory muscles of respiration; is coughing up yellow mucous; and has a pulse oximetry reading of 86%.The highest-priority nursing diagnosis is:

A) Impaired Gas Exchange related to low pulse oximeter reading.
B) Impaired Airway Clearance related to thick mucus.
C) Injury (respiratory arrest) , high risk for secondary to severe respiratory impairment.
D) Decreased Cardiac Output related to tachycardia and rapid breathing.