Hey! i’ll give brainliest please help.

How did modern american history begin with “contact”?

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.

Which revision stands out as most effective for a multimedia presentation slide? sources were left out. the language is simplified. a lot of the information is left out. sentences were used instead of phrases.