The nurse manager of the emergency department arranges for critical incident stress debriefing for the staff after a mass casualty incident. Which statement by the debriefing team leader is most appropriate for this situation?

"Let's evaluate what went wrong and develop policies for future incidents."

"This session is only for nursing and medical staff, not for ancillary personnel."

"Let's pass around the disaster written policy for everyone to review."

"You are free to express your feelings, whatever is said here stays here."