A Patient with a Medical History of Sickle Cell Anemia

A patient with a medical history of sickle cell anemia is complaining of chest pain and shortness of breath.The patient is breathing 26 times a minute in short,shallow respirations.However,the patient's oxygen saturation via pulse oximetry is 100% on room air.The best approach regarding supplemental oxygen is to:

A) do nothing; no supplemental oxygen is necessary.
B) place the patient on a nonrebreather mask.
C) place the patient on a nasal cannula.
D) place the patient on a simple face mask.