What briefing should be given to the ABP during ditching at main doors when CC are incapacitated?

The correct choice emphasizes the importance of following the captain's command during an emergency situation such as ditching, especially when the cabin crew (CC) is incapacitated. The cabin crew is trained to maintain communication with the flight crew and to execute their commands. In a scenario where the main doors are involved in a ditching, the captain will typically provide clear and specific instructions regarding the situation and evacuation procedures.

This choice is critical because it underscores the hierarchy and decision-making authority within the cockpit and cabin crew structure. Adhering to the captain's commands ensures that actions taken during the ditching are coordinated and consistent with the overall emergency plan, enhancing the safety of all passengers.

The other options present actions that require a level of independence or decision-making by the ABP that may lead to confusion or contradictory actions in a high-stress situation, potentially jeopardizing the safety of passengers. It's essential to have a clear chain of command for efficient and effective evacuation processes.