As we know, the story progresses to show that the pigs throw those values to the wind as soon as they realized how good it is to have power. "Animal Farm" was written to criticize the Soviet regime in Russia, the pigs representing the Soviet leaders, the other animals representing the Russian people.
I would say C because this passage talks about green building and how it's beneficial. Sentence 4 mentions about what the green roofs are made of and I don't think that would be necessary to include in this passage.
