A Patient with a Nasal Cannula at 5 L/min Has

A patient with a nasal cannula at 5 L/min has skin irritation around the nares and complains of a dry mouth and nose.Which action by the student nurse should be questioned by the nursing instructor?

A) Using humidification
B) Applying petroleum-based gel to the nares
C) Providing frequent oral care
D) Asking the physician for an order for sterile nasal saline