Which of the Following Is True About the West in the Post-Reconstruction

Which of the following is true about the West in the post-Reconstruction era?​

A) Violence escalated dramatically.
B) The War Department established a system of forts and ​increased military presence in the region.
C) Grant initiated his Peace Policy in an effort to resolve disputes with natives in a more benevolent manner.
D) Native peoples were moved onto reservations.
E) All of these are correct.