Answer:
A. Native Americans begin charging fees to cross their lands.
Native Americans begin charging fees to cross their lands event caused many drovers to shift from using the Chisholm trail to the Western Trail.
The Chrisholm Trail was a chain used by cattle drivers to move their cattle from ranches in Texas to Kansas railheads during the post-civil war. It consists of trading posts for guiding but not a cattle drover.
Therefore, it leads Americans to charge tax from cattle movers as they were gathered in the Red River Station of Texas.
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