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托福TPO10的第三篇文章VariationsintheClimate中第四题的答案.4.Accordingtoparagraph3,scientistsareabletoreconstructproxytemperaturerecordsby○studyingregionaldifferencesintemperaturevariations○studyinganddat

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托福TPO 10的第三篇文章Variations in the Climate中第四题的答案.
4. According to paragraph 3, scientists are able to reconstruct proxy temperature records by
○ studying regional differences in temperature variations
○ studying and dating changes in the properties of substances
○ observing changes in present day climate conditions
○ inferring past climate shifts from observations of current climatic changes
答案是B,但我始终认为答案是A.明明文章中讲了大段的地理不同:格陵兰、西欧、大西洋.
望前辈给予解释.
▼优质解答
答案和解析
Proxy temperature records have been reconstructed from ice core drilled out of the central Greenland ice cap.
文章有根据可寻的,ice cap 不就是那些properties of substances么?