What are flight attendant duties following a land evacuation?

The correct choice emphasizes the critical responsibility of flight attendants to ensure passenger safety and accountability after a land evacuation. After an evacuation, it is essential to instruct passengers to assemble at a safe distance from the aircraft. This action helps to prevent any potential hazards associated with the aircraft, such as fire or explosions, while also ensuring that all individuals are accounted for. Conducting a headcount is crucial in this scenario since it allows the crew to confirm that everyone has evacuated safely and no one is missing, which is paramount for the safety and security of all involved.

The other options do not align with the immediate priorities following a land evacuation. Locking the cabin and preparing for reboarding would not be appropriate until all safety concerns are addressed. Directing passengers outdoors and calling for assistance, while partially correct, lacks the critical component of organizing an assembly and headcount, which is fundamental in managing the post-evacuation scenario. Gathering luggage would not only be impractical under emergency conditions but also poses risks, as ensuring passenger safety must take precedence over personal belongings.