GMAT Sentence Correction
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Source: OG
Level: 4
Some anthropologists believe that the genetic homogeneity evident in the world's people is the result of a "population bottleneck" -at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.
- A at some time in the past our ancestors suffered an event, greatly reducing their numbers
- B that at some time in the past our ancestors suffered an event that greatly reduced their numbers
- C that some time in the past our ancestors suffered an event so that their numbers were greatly reduced,
- D some time in the past our ancestors suffered an event from which their numbers were greatly reduced
- E some time in the past, that our ancestors suffered an event so as to reduce their numbers greatly,