Writers help the urban poor by writing about their lives and their difficulties in populated cities and poor hygiene conditions. Which brought the attention of the upper class and the government to reform and improve the lives of the working class.
After the collapse it become a "democratic" nation so US saw it as less of a enemy. Also, it become a lot weaker so it wasn't as big of a rival or threat to the USA. Allowing it to trade and work together on major projects.
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D is the correct answer. I just took this quiz not too long ago and got it right. Hope this helps