Final answer:
The most appropriate leadership style in this situation would be authoritarian.
Step-by-step explanation:
The most appropriate leadership style in this situation would be authoritarian. In times of crisis or emergencies, a leader needs to take charge and quickly make decisions to ensure the safety and well-being of the staff and patients. An authoritarian leader would provide clear instructions and assign tasks to address the high levels of anxiety and disorganization. This style of leadership is effective in situations where quick decision-making and direction are needed.