Respuesta :
The reaction of Native Americans to the flow of pioneer settlers into the western United States was that they met the settlers wagon trains and traded with them.
What was the flow of pioneer settlers into the western region?
They followed a route blazed by fur traders that took them west along the Platte River through the Rocky Mountain to the West.
The Native Americans reacted by meting the settlers wagon trains and traded with them.
Therefore, the Option A is correct.
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