Choose the revision that corrects any punctuation errors in the sentence below. If no change is needed, select "No correction is necessary."
Yes they had at long last found it-the tomb of Tutankhamun the boy king of Egypt who had ruled a powerful nation over 3000 years before a tomb full of priceless treasure.
A) Yes, they had at long last found it, the tomb of Tutankhamun—the boy king of Egypt who had ruled a powerful nation over 3000 years before—full of priceless treasure.
B) Yes they had at long last found it. The tomb of Tutankhamun—the boy king of Egypt who had ruled a powerful nation over 3000 years before a tomb, full of priceless treasure.
C) Yes, they had at long last found it—the tomb of Tutankhamun—the boy king of Egypt who had ruled a powerful nation over 3000 years before a tomb, full of priceless treasure.
D) No correction is necessary.