What happened in 1821 that encouraged the further development of Western trade routes, some of which crossed the Oklahoma Territory?

A. The Trail of Tears brought American Indians farther west.
B. Mexico achieved independence from Spain.
C. Gold was discovered in California.
D. The first railroad that crossed the continent was constructed.

A?

4 answers

None of the others happened in or around 1821 so I would say A
Correct.
Popular trade items from the osage of the three forks region in the late 1700s included fur, honey, and?
Popular trade items from the Osage of the Three Forks region in the late 1700s included fur, honey,