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Which choice most logically completes the text? In the early nineteenth century, some Euro-American farmers in the northeastern United States used agricultural techniques developed by the Haudenosaunee (Iroquois) people centuries earlier, but it seems that few of those farmers had actually seen Haudenosaun ee farms firsthand. Barring the possibility of several farmers of the same era independently developing techniques that the Hauden osaunee people had already invented, these facts most strongly suggest that ______.