Answer :
The correct answer would be, Metal Currency.
Historians believe that the Chinese developed the first Metal Currency.
Explanation:
Historians are the people who investigate, research and write about the past. They have the authority to write about the past after a sound research and work.
So Historians believe that Chinese were the ones who developed the first metal currency. A Metal Currency is a currency in the form of, which now a days called as Coin. This is because, they found coins in Anyang before the 900 BC.
At that time, the coin was called as the Bronze Shell. Those bronzed shells were found in the ruins of Yin. Yin was the old capital of Shang Dynasty.
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