The correct options are
A To arrange for a blockade.
B Provide first aid to people.
D To involve police and secutity forces in the rescue operation.
A stampede is uncontrolled concerted running as an act of mass impulse among herd animals or a crowd of people in which the group collectively begins running, often in an attempt to escape a perceived threat. One of the major safety measure is to involve police and security forces in the rescue operation . The correct answer is D.