Boundaries: Punctuation and Sentence Structure

SAT Reading and Writing· difficulty 4/5

The discovery ______ a single fragment of pottery bearing an unfamiliar script ______ has prompted a complete reevaluation of the site's chronology.

Which choice completes the text so that it conforms to the conventions of Standard English?

  • A

    ; / ;

  • B

    , / —

  • C

    — / ,

  • D

    — / —

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Explanation

Paired em dashes are appropriate for emphatic parentheticals and must match — both em dashes here.

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