GMAT Sentence Correction

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Source: GWD

Level: 4

The agreement, the first to formally require industrialized countries to cut emissions of gases linked to global warming, is a formal protocol by which 38 industrialized countries must reduce emissions of these gases by 2012 or face heavy penalties.

  • A by which
  • B for which
  • C under which
  • D such that
  • E wherein

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