This is because iron is more reactive than copper in the metal reactivity series.
Answer: Mongol leader Genghis Khan (1162-1227) rose from humble beginnings to establish the largest land empire in history. After uniting the nomadic tribes of the Mongolian plateau, he conquered huge chunks of central Asia and China.
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the correct answer is C) SILK ROAD
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Answer: <em>I think the answer is B, hope this helps! If not so sorry.</em>
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