Final answer:
In response to the command 'Evacuate, Evacuate,' the appropriate reaction would be to open emergency exits and standby for assistance. This ensures a prompt and safe departure from the aircraft in an emergency. Following flight crew instructions is vital for passenger safety.
Step-by-step explanation:
Once the aircraft comes to a complete stop on the ground and the Captain gives the command "Evacuate, Evacuate," the correct course of action from the options provided would be to Open Emergency Exits! Standby for Assistance. This directive is aimed at ensuring that passengers can leave the aircraft swiftly and safely, often in times of emergency. In contrast, holding onto personal belongings or staying seated could create obstacles and delay the evacuation process, putting everyone at greater risk.
In the scenario provided, where an actual emergency occurred due to a loss of fuel in a 767 airplane, the proficient actions of the flight crew and pilots, based on their training and quick thinking, were crucial in securing the safe landing and rapid evacuation of passengers. In the event of an in-flight emergency where evacuation is necessary, instructions from the flight crew should be followed promptly without hesitation for everyone's safety.