How was the American political system changed during the Progressive Era to address the situation described in the excerpt above?

What is the main social system that existed in ancient china?

What two different approaches did the knights of labor and the american federation of labor take in building a union organization? a) the knights of labor accepted only unskilled workers; the american federation of labor accepted only skilled workers. b) the knights of labor accepted skilled and unskilled workers; the american federation of labor accepted only skilled workers. c) the knights of labor refused to accept african american or chinese workers; the american federation of labor accepted all workers. d) the knights of labor accepted workers from a single industry; the american federation of labor accepted workers from several industries.

What do the differing approaches of booker t. washington and w. e.b du bois suggest about their views of american society?