Who was at the top of that hierarchy in medieval european society

Which statement describes a similarity between the great migration and to this day

In the mid-1800s, how did american indians often react to the us government signing treaties with tribal chiefs to establish reservations? many american indians did not accept the treaties and resisted relocating. many american indians fought for land taken away by the dawes act. many american indians bought land in oklahoma from white settlers. many american indians accepted the treaties and relocated voluntarily.

When conducting research for forming a hypothesis, which practice should historians follow?