单选题:WhatcanbeinferredfromParagraph3concerningdinosaurs?

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题目内容:

WhatcanbeinferredfromParagraph3concerningdinosaurs? A.Theywerekilledoffbyanasteroid.
B.Theydiedofdrasticclimatechange.
C.Theywerewipedoffbyavolcaniceruption.
D.Thecauseoftheirextinctionhasremainedacontroversialissue.

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