A Patient in Respiratory Distress Enters the Emergency Department

A patient in respiratory distress enters the emergency department.The patient denies a history of chronic obstructive pulmonary disease (COPD) .The nurse anticipates a prescription for oxygen delivered by which method to achieve the highest possible concentration of oxygen?

A) Simple face mask at 15 L per minute
B) Nonrebreathing face mask at 15 L per minute
C) Venturi mask at 15 L per minute
D) Oxygen tent at 15 L per minute