an rn is observing a nursing student who is suctioning a hospitalized patient with a tracheostomy in place. which action by the student requires the rn to intervene? a. the student pre oxygenates the patient for 1 minute before suctioning. b. the student puts on clean gloves and uses a sterile catheter to suction. c. the student inserts the catheter about 5 inches into the tracheostomy tube. d. the student applies suction for 10 seconds while withdrawing the catheter.