hard · GRE Verbal

A style guide states that a comma should separate items in a list only when the list contains more than two items. An editor reviewing a manuscript encounters the phrase “red, white and blue” and must decide whether the guide's rule requires a comma before “and blue” in this instance. What is the primary purpose of this passage?

  1. To prove that the manuscript's punctuation is incorrect
  2. To state a rule and apply it to a specific case to see what it requires
  3. To report the phrase without indicating what the stated rule implies for it
  4. To narrate the history of comma usage conventions in publishing
  5. To compare the style guide with a rival grammar authority's list rule

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