While Trying to Use a Finger Probe to Assess a Patient's

While trying to use a finger probe to assess a patient's oxygenation status,the respiratory therapist finds that the pulse rate and the ECG monitor heart rate are not consistent and the oxygen saturation measured by pulse oximeter (S_pO₂) reading is blank.The patient is awake,alert,and in no obvious respiratory distress.The respiratory therapist should first take which of the following actions?
1) Change the probe site.
2) Draw an arterial blood gas.
3) Adjust the probe position on the finger.
4) Remove probe,perform a capillary refill test.

A) 1 and 2 only
B) 2 and 3 only
C) 3 and 4 only
D) 1 and 4 only