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There are recent reports of apparently drastic declines in amphibian populations and of extinctions of a number of the world’s endangered amphibian species. These declines, if real, may be signs of a general trend toward extinction, and many environmentalists have claimed that immediate environmental action is necessary to remedy this “amphibian crisis,” which, in their view, is an indicator of general and catastrophic environmental degradation due to human activity.
It can be inferred from the passage that the author believes which of the following to be true of the environmentalists mentioned in highlight lines ?
A. They have wrongly chosen to focus on anecdotal reports rather than on the long-term data that are currently available concerning amphibians.
B. Their recommendations are flawed because their research focuses too narrowly on a single category of animal species.
C. Their certainty that population declines in general are caused by environmental degradation is not warranted.
D. They have drawn premature conclusions concerning a crisis in amphibian populations from recent reports of declines.
E. They have overestimated the effects of chance events on trends in amphibian populations.
原文太长了,就放了关键的第一段,我的问题是:为啥不选C,C项说这些环境学家对于(population declines 是由environmental degradation)的确定性是无法保证的。不是与原文第一段相对应吗。。。
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