What was significant about the Nez Perce War?

A. It was the last of many conflicts that prompted the use of treaties to avoid future conflicts.
B. It was more serious than the Yakima War and had more influence on American Indian tribes.
C. It was the war between the US government and an American Indian tribe that was the beginning of all future conflicts.
D. It was a conflict between the US government and an American Indian tribe that a treaty failed to prevent.