What response is expected from crew members after the aircraft has safely landed?

Once the aircraft has safely landed, conducting a headcount and ensuring all passengers disembark safely is a critical responsibility for crew members. This process ensures the safety of everyone onboard, confirming that no passengers are left on the aircraft and that any emergency procedures have been followed correctly.

This step also helps in the identification of any potential issues that might arise during disembarkation, such as ensuring that individuals who require assistance receive the necessary help. Safety is the top priority, and this action aligns with standard operating procedures in the aviation industry, emphasizing crew accountability for passenger welfare.

The other options, while they may be relevant in different contexts, do not directly address the immediate concern for passenger safety and accountability following a landing. Preparing for the next flight or locking the aircraft doors takes precedence only after confirming that all passengers have safely exited the plane. Gathering passengers for a debrief is not a typical procedure immediately following landing.