Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks .

On October 29, 2022, a Halloween disaster (29 )_______the lives of more than 150 people in Seoul. This kind of event where a large group of people tries to move into a space at once, is called a crowd crush or crowd surge. It can include a “crowd collapse,” (30)_______ is when several people fall down and can’t get back up.
Crowd surges increase the pressure in an area, making it hard to breathe. Often, people get injured when they either fall or lose consciousness in the midst of the crowd surge. (31)_______potential issue with crowd surges is that it can be difficult for people around those who are injured to recognize that there is a problem, (32)_______ this can lead to delays in getting help to whoever needs it.
If you find yourself in a dangerous crowd before you can pull away, there are some things to keep in mind. The most important thing you can do is keep your balance. You should also stay collected and refrain from screaming to (33)_______ the oxygen in your space, as well as try to keep your arms at chest level to protect your rib cage. Above all, you should try to help others around you.