The city of Sumer, located along the Persian Gulf, made significant contributions to future civilizations. Which of the following is NOT one of those contributions?
O practice of polytheistic religion
O development of a written language known as cuneiform
O made writing tablets from clay
O created three-man chariot

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.