B, D, and E are the correct answers. Literary themes are usually profound statements that teach a "lesson". A and C are just random sentences that don't have meaning.
C is the right one. Unlike quotations or paraphrased ideas, information that's considered "common knowledge" doesn't need to be cited. "Common knowledge" is information that's considered widely known or easily verified.
Answer:
Once the young man leaves his home, he starts to wonder in a society familiar to him but completely unknown at the same time. He had spent all his life under the care of his family, once he steps outside of his house he is gone for good. That was a common situation for the rich citizens that live as if they were apart from society. We can even trace that same behavior to our contemporary societies were social classes prominently divide people within the same community. The only difference is that in the book Siddharta leaves behind all his privileges, something very unlikely in today's society.
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