The reasons native american culture was irrevocably changed by the end of the 1800s are?

The reason why Native American culture was irrevocably changed by the end of the 1800’s are the following;

-          There are heavy support in terms of the western migration

-          Abandoning of culture was usually common as the natives are set to become Americanized

-          No support of individual rights

i honesty don't know, good luck tho dawg

d is the correct answer