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.
He didn’t do anything, that was the problem.
This answer is definitely A. merchants. Hope this helps please thank me and five star!
The American revolution opened so many different trade opportunities that the colonist night longer needed Britain and their manufacturers