They were hunters and trappers who increased trade in the US and it motivated others to move west.
Explanation:
im pretty sure its the second one
The correct answer is B) emergence of a written language
Unlike the other mentioned things, emergence of a written language did revolutionize Native American cultures. Everything else mentioned here was just there and completely normal as they were hunters and what not.
Because a lot of people were not subject to it and so they werent taxed
