A Patient Who Is Severely Dyspneic and Cyanotic Enters the Emergency

A patient who is severely dyspneic and cyanotic enters the emergency department.The nurse gives the patient oxygen at:

A) 2 L to preserve the hypoxic drive
B) 6 L to relieve the dyspnea
C) 8 L, humidified, to liquefy secretions
D) 10 L, humidified aerosol, to dilate the bronchi