题目内容（请给出正确答案）

[单选题]

Alice can make 20 dollars per hour. Bob earns 40% more than Alice, and Carlos earns 25%

A. How much does Carlos earn per hour？（）

B.18$

C.21$

D.28$

E.35$

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第1题

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第2题

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第3题

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第4题

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第5题

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