<u>Answer:</u>
D. a story set during a major battle.
<u>Explanation:</u>
The chaotic tone of the passage is one of panic, emergencies, accidents, bravery, fear and much more, all of which can be associated with a story set during a major battle.
Even the instances from the passage attest to that with danger lurking all around, people trapped in a supposedly safe zone until it no longer remains safe, the emergency equipment, like the emergency radio in the passage, the urgency of the situation wherein Juan needs to go check up on his mother who's alone "out there", chaos among people, etc. The mood of the passage is tense and there's a sense of impending disaster in the undertone of the passage, which further relates to a story set during a major battle.
