According to historical perspective, the statement that provided more prisoners for Aztec human sacrifice rituals and contributed to some native cultures allying with the Spanish against the Aztecs is "<u>Aztec conquest of neighboring territories."</u>
When the Aztec conquered neighboring territories, usually through wars, they took war captives from these territories, including men, women, and children.
Some of these war captives were taken as slaves, while some were used as a human sacrifice by the Aztec's religion or government.
However, due to these conquests, many neighboring territories were not happy about the Aztecs. Thus, they quickly form alliances with the Spanish invaders to conquer the Aztecs.
Hence, in this case, it is concluded that the correct answer is option A. "Aztec conquest of neighboring territories."
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