easy · GMAT Verbal
Argument: A wildlife preserve observed that the population of wolves in the area increased significantly over five years, during which the deer population fell by 30%. The preserve managers concluded that the wolves are the primary factor controlling the deer population.
Which of the following, if true, most weakens the managers' conclusion?
- The number of visitors permitted to hike through the preserve was sharply restricted during the five-year period.
- Wolves in the preserve also hunt smaller animals like rabbits and rodents in addition to deer.
- The preserve is surrounded by a fence that prevents deer from migrating into or out of the area.
- A survey of visitors to the preserve showed that most people were excited to see wolves in their natural habitat.
- The region suffered through three of its harshest winters on record during that same five-year period.
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