In the selection from The Once and Future King, the special problem the King's death leads to is D. It leaves everyone uncertain who will be the next king.
According to the book The Once and Future King, the author tells a story of King Uther Pendragon of Camelot who died without a male heir and no written document showing who was to become the next king.
As a result of this, there was a stone that was fixed to an anvil and it was declared that anybody that was able to remove it would become the next king.
Therefore, the correct answer is option D
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