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题目材料：
Centuries ago, the Maya of Central America produced elaborate, deeply cut carvings in stone. The carvings would have required a cutting tool of hard stone or metal. Deposits of iron ore exist throughout Central America, but apparently the Maya never developed the technology to use them and the metals the Maya are known to have used, copper and gold, would not have been hard enough. Therefore, the Maya must have used stone tools to make these carvings.
Which of the following, if true, most seriously weakens the argument?
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A.In various parts of the world, civilizations that could not make iron from ore fashioned tools out of fragments of iron from meteorites.
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B.All the metallic Mayan artifacts that have been found by archaeologists are made of metals that are too soft for carving stone.
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C.The stone out of which these carvings were made is harder than the stone used by other Central American peoples.
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D.The technique that the Maya used to smelt gold and some other metals could not have been easily applied to the task of extracting iron from iron ore.
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E.Archaeologists disagree about how certain stone tools that have been found among Mayan ruins were used.
A显示答案
