What is the main idea of this passage? Sir Isaac Newton is the greatest scientist of this era.
Light comes from the sun in fewer than seven minutes.
The followers of Descartes know more than those who follow Newton.
People still don’t understand how the world wor

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.