The Patient Is Brought to the Emergency Department Complaining of Severe

The patient is brought to the emergency department complaining of severe shortness of breath.She is cyanotic and her extremities are cold.In an attempt to quickly assess the patient's respiratory status,the nurse should

A) remove the patient's nail polish to get a pulse oximetry reading.
B) use a forehead probe to get a pulse oximetry reading.
C) use a finger probe to get a pulse oximetry reading.
D) check the colour of the patient's nail polish before attempting a reading.