How did the failed boxer rebellion help bring an end to the manchu dynasty

What directive in source a might have been at the root of the action described in source b?

The spanish class system placed people in the top class primarily based upon how much american blood a person had. how much spanish blood a person had. where a person worked. whom a person married.

Using complete sentences, compare and contrast the leadership and accomplishments of martin luther king, jr. and frederick douglass.