(单选题)

Scientists will challenge your assumption on which rest the ( ) of the argument and conclusion.

A.eligibility

B.validity

C.efficiency

D.effectiveness

参考答案：B

参考解析：

A项，eligibility“合格”，不符合句意，排除。B项，validity意为“符合逻辑；正当”，此处与of the argument and conclusion搭配，意为论点和结论的正确性，正确。C项，efficiency意为“效率；效能”，不符合句意，排除。D项，effectiveness“有效性”，不符合句意，排除。故本题正确答案选B。

知识点：词汇辨析英语语法串讲通用英语

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