Final answer:
The detail that supports the theme that disasters bring out the worst in people is the instance of cartmen demanding an exorbitant amount of money for a simple task.
Step-by-step explanation:
The detail that supports the theme that disasters bring out the worst in people is:
"I heard of cartmen demanding one hundred and fifty dollars... for carrying a single load."
This detail highlights how during disasters, some individuals take advantage of the situation to exploit others for personal gain. The cartmen demanding an exorbitant amount of money for a simple task illustrates the greed and selfishness that can prevail in such situations.
Contrasting this inhuman behavior, the other details mentioned, such as people performing kind acts and both the poor and the rich helping each other, do not support the theme of bringing out the worst in people. They show how catastrophes can also bring out the best in individuals, fostering solidarity and compassion.
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