GMAT 考满分题库

Magoosh - 逻辑CR - 46
Several years ago, the number of wood bison became so low that conservationists began breeding the wood bison in an enclosed refuge. In this time, the number of wood bison has tripled and, according to conservationists, this number is enough for a species to remain viable in the wild. Yet since the wood bison`s habitat is still mperiled,conservationists plan to move the wood bison 2,000 miles away, where the American buffalo, a distinct species, flourishes. The conservationists predict that such a plan will allow for the long-term viability of the wood bison as a species.

Which of the following, if true, calls into question the conservationist`s prediction?
  • AThe American buffalo and the wood bison can thrive off of the same resources. 分析该选项
  • BNo wood bison has ever been within 1,000 miles of the area in which the conservationists are planning to move the herd. 分析该选项
  • CThe American buffalo and the wood bison readily mingle, and, in the past, this has lead the two species to mix so that the number of actual wood bison declines steadily. 分析该选项
  • DAmerican buffalo once shared territory with the wood bison, but the American buffalo`s territory slowly moved south so that now the American buffalo no longer inhabits the same area as the wood bison. 分析该选项
  • ENot all of the predators that hunt the wood bison hunt the American buffalo. 分析该选项
正确答案: C

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