GMAT Sentence Correction

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Source: OG

Level: 3

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

  • A have to know a great deal more than now about the social and economic
  • B have to know a great deal more than they do now about the social and economical
  • C would have to know a great deal more than they do now about the social and economical
  • D would have to know a great deal more than they do now about the social and economic
  • E would have to know a great deal more than now about the social and economical

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