The statement about Mound Builder ear spools that is true is A. They have pictures scratched or carved onto a flat surface.
It should be noted that the Mound Builder ear spools were made from natural materials like clay, shell, or stone. They also have pictures scratched or carved onto a flat surface.
It should be noted that the Mound Builder ear spools are not strung and worn around the neck like a chain. They didn't have pictures that were made with detailed lines and shapes as well.
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