Many middle eastern countries depend on oil as their main source of income. this is a problem because
a. oil production does not provide much money, and the region is poor
b. oil is a nonrenewable resource that may run out in the future
c. the region is rich in farmland and should be focusing on agriculture
d. there is not a demand for oil, and no countries want to purchase it

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.