Final answer:
The nurse should anticipate an oxygen saturation of 99% when assessing the respiratory status of a client with COPD and an acute respiratory infection.
Step-by-step explanation:
The correct answer is c. An oxygen saturation of 99%. In the case of a client with chronic obstructive pulmonary disease (COPD) who is admitted to an acute care facility due to an acute respiratory infection, a high oxygen saturation level indicates adequate oxygenation which is an anticipated finding.