Leading is the management process which is suitable for the given situation
Step-by-step explanation:
A) controlling : There are certain things associated with controlling but when the situation is too crucial, controlling is not the right choice to move ahead.
B) leading : This is the right choice because a good leader always leads the team especially during the crisis management or when the situation becomes worse.
C) planning : This choice is not relevant to the question because here we are talking about crisis management.
D) organizing: Organizing seems to be right, but here the immediate action and leading is required.