What was president wilson's main motivation and drafting his 14 points

Explain how zollverein, a tariff agreement, to unite the german states.

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 rights are guaranteed in the 13th,14th, and 15th amendments. why was it necessary to change the constitution to guarantee these rights?