What should a Flight Attendant say if an exit is blocked and cannot be used for evacuation?

The appropriate response for a Flight Attendant when an exit is blocked and cannot be used for evacuation is to instruct passengers to "CROSS OVER, TURN AROUND." This command provides clear and actionable steps to help manage the situation effectively. "Cross over" suggests that passengers should move to an alternate exit by crossing over to a different aisle, which emphasizes directing them safely away from the blocked exit. "Turn around" indicates that they should change direction to find another available exit, ensuring that the evacuation can continue efficiently without confusion or hesitation.

This clear instruction aims to create a smooth flow of movement during an emergency, preventing panic and ensuring that passengers are guided to safety effectively. The other options do not provide the same level of clarity or actionable directions, which can lead to confusion during an emergency evacuation.