Final answer:
The nurse should prioritize applying supplemental oxygen to a COPD patient presenting with shortness of breath and an elevated respiratory rate, while also continuously monitoring the patient's condition.
Step-by-step explanation:
When a nurse is caring for a client with chronic obstructive pulmonary disease (COPD) presenting with shortness of breath, a respiratory rate of 28 breaths/min, and an O2 saturation of 92, the intervention to prioritize would typically be applying supplemental oxygen to address the immediate need for oxygenation. However, interventions should always be in line with the patient's individual care plan and orders from a healthcare provider. It is also important to monitor the client continuously as interventions can change based on their evolving condition.