Bye the end of the Shang Dynasty, the Chinese had developed a form of writing in which each character represented a word or idea. Therefore, the answer is D. The writing system was exposed in bones and in tortoiseshells.
<span>Feudalism, a system in which a person (vassal) pledged loyalty for protection, was a well-established part of the agricultural system of the Middle Ages.
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-vf</span>
1 3 2 4 I think lemme know if this helps