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题库 / GMATLA-CR-14
Ecologists:the Scottish Highlands were once the site of extensive forests, but these forests have mostly disappeared and been replaced by peat bogs. The common view is that the Highland's deforestation was caused by human activity, especially agriculture. However, agriculture began in the Highlands less than 2,000 years ago. Peat bogs, which consist of compressed decayed vegetable matter, build up by only about one foot per 1000 years, and, throughout the Highlands, remains of trees in peat bogs are almost all at depth great than four feet. Since climate changes that occurred between 7,000 years and 4,000 years ago favored the development of peat bogs rather than the survival of forests, the deforestation was more likely the result of natural processes than of human activity.
In the ecologist's argument, the two portions in boldfaces play which of the following roles?
The first is evidence that has been used in support of a position that the argument rejects; the second is a finding that the ecologist uses to counter the evidence.
The first is evidence that, in light of the evidence provided in the second, serves as grounds for the ecologist's rejection of a certain position
The first is a position that the ecologist rejects; the second is evidence that has been used in support of that position
The first is a position that the ecologist rejects; the second provides evidence in support of that rejection
The first is a position for which the ecologist argues; the second provides evidence to support that position.
摘
1. in light of 根据； 2. 前一个黑体句子很明显是evidence而非position（立场），排除CDE； 3. 第一句是依据第二句为基础的证据---都证明了这个peat bogs早在农业兴起之前就已经开始replace forest了，强化了生态学家们的point。
C：deforestation不是因为人类活动，而是因为自然气候
人类活动发现于2000年前，而根据peat bogs的生长来看，deforestation应该出现在4000年前
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