A client with a history of chronic obstruction pulmonary disease (COPD) is admitted with pneumonia. Vital signs include: heart rate 122beats/minute. respiratory ate 28 breaths/minute, and blood pressure 170/90 mmHg. Which assessment finding warrants the most immediate intervention by the nurse?
a. Shortness of breath on exertion.
b. Bilateral diffuse wheezing
c. Yellow expectorated sputum
d. Temperature of 100.5 F (38.1 C).