A nurse is caring for a client who has pneumonia. Data collection findings include temperature 37.8 (100 F), respiration 30/min. blood pressure 130/76 mm Hg, heart rate 100/min, and SaO2 91 % on room air. Which of the following actions is the nurse priority?
A: Administer antibiotics
B: Administer oxygen therapy
C: Perform a sputum culture
D: Administer an antipyretic medication to promote client comfort