When a Patient with COPD Is Receiving Oxygen, the Best

When a patient with COPD is receiving oxygen, the best action by the nurse is to

A) avoid administration of oxygen at a rate of more than 2 L/min.
B) minimize oxygen use to avoid oxygen dependency.
C) administer oxygen according to the patient's level of dyspnea.
D) maintain the pulse oximetry level at 90% or greater.