Problem: Grey Sloan Hospital responds to a landslide. Which action should the nurse supervisor take to prevent staff post-traumatic stress disorder during a mass casualty event? A. Provide water and healthy snacks for energy throughout the event. B. Schedule 16-hour shifts to allow for greater rest between shifts. C. Encourage counseling upon deactivation of the emergency response plan. D. Assign staff to different roles and units within the medical facility.