A nurse is collecting data from a client who reports feeling short of breath and notes that the client's SpO2 level is 88% while on room air. Which of the following actions should the nurse take first?

Recheck the client's SaO2 level after having the client cough and clear their throat.

Notify the charge nurse of the client's condition.

Review the client's most recent SaO2 level in the medical record.

Check the client's medical records to see which medications were recently admitted.