In the selection from The Once and Future King, the special problem the King's death leads to is <u>D. It leaves everyone uncertain who will be the next king.</u>
According to the book <em>The Once and Future King</em>, 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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