The most appropriate tone for an expository essay would be
2 answers:
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The correct answer is the first option. You can see that this answer is correct by reading this part of the passage: "Besides the fact that the new school was twice the size of his previous one, the student body was also enlarged which added to his anxieties. Furthermore, his older brother told him that the teachers would be rigorous and the classes more exigent; he questioned how he would ever survive in this jungle."
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