When a Hospitalized Patient with Chronic Obstructive Pulmonary Disease

When a hospitalized patient with chronic obstructive pulmonary disease ( COPD ) is receiving oxygen, the best action by the nurse is to

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