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.
The bureau of Indian Affairs was organized in 1824 as part of the "Department of War," since prior to this organization the military had been the go-to organization for dealing with Indian issues.
Grace period seems correct
Answer:
This in part led to the Leipzig debate in summer 1519 with Johann Eck. This debate forced Luther to clarify some of his theories and doctrinal stances against the representative of the Catholic Church. ... This seems surprising; Luther's primary purpose in writing the 95 Theses was to protest the selling of indulgences.
