How did machines change workers’ lives?
they required more expertise and skill.
they divided labor into many small tasks.
they decreased the pace of work.
they increased the number of workers needed.

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.