GMAT Sentence Correction

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Source: PREP

Level: 3

Both the complexity of the phenomenon known as extinction and the vastness of the biosphere, having prompted many scientists to call for a large increase in the number of biologists working both in the field and in laboratories to clarify the relationships among the planet's many endangered life-forms.

  • A and the vastness of the biosphere, having prompted many scientists to call for a large increase in the number of biologists working both
  • B and the vastness of the biosphere has prompted many scientists calling for a large increase in the number of biologists both working
  • C and the vastness of the biosphere have prompted many scientists to call for a large increase in the number of biologists working both
  • D as well as the vastness of the biosphere have prompted many scientists to call for a large increase in the number of biologists who both work
  • E as well as the vastness of the biosphere has prompted many scientists to call for a large increase in the number of biologists who work both

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