Which sentence contains a spelling error?
the police officer found himself in a quandary when it came to setting up roadblocks.
he wanted to set up several roadblocks in the neighborhood; however, they're were limited personnel available.
normally, two uniformed officers staff every police vehicle as a safety precaution.
the officer arranged for three police cars to be at each stopping point.

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.