Final answer:
The action that indicates the new RN is safe is using a closed-suction technique to suction the patient. This method reduces the risk of ventilator-associated pneumonia and minimizes contamination.
Step-by-step explanation:
The action that indicates the new RN is safe is b. The RN uses a closed-suction technique to suction the patient. Closed-suction technique is a safe method of suctioning mechanically ventilated patients because it reduces the risk of ventilator-associated pneumonia (VAP) and minimizes the potential for contamination. It involves using a closed-system suction catheter that is enclosed in a sheath, which helps maintain a closed circuit while suctioning.