Which of the following best reflects the recommended use of punctuation in formal legal writing to signal an interruption to which the writer would like to draw attention? Courts have expanded the meaning of "diversity" as a legal concept so that its original meaning (a "doorway" for racial integration) is now far too limited. Courts have expanded the meaning of "diversity" as a legal concept so that its original meaning a "doorway" for racial integration - is now far too limited. Courts have expanded the meaning of "diversity" as a legal concept so that its original meaning-a "doorway" for racial integration-is now far too limited. Courts have expanded the meaning of "diversity" as a legal concept so that its original meaning -- a "doorway" for racial integration -- is now far too limited