The item which is an example of an artifact is A. Coin.
Artifact is a term to refer to any object made with a specific technique. The artifacts are manufactured to perform some specific function, for example:
Artifacts are also used by historians to learn about past communities, their customs, and practices. According to the above, the correct answer is A. Coin, because this artifact was used in old comunities for economic relations.
Additionally, options B, C, and D are not correct because they refer to objects that do not classify within the category of artifacts but rather refer to remains of living beings from the past.
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