Which of the following must happen to overrule a veto by the president? a: two thirds of the house of representatives must vote to override a veto. b: two thirds of both houses of congress must vote to override a veto. c: three fourths of the senate must vote to override a veto. d: three fourths of both houses of congress must vote to override a veto.

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.