Why was the term political machine used to describe corrupt political systems in the late 1800s? a) political machines ran very smoothly, like clocks. b) political machines created cycles that turned, like gears. c) political machines were led by factory owners. d) political machines worked like assembly lines.

disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.

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.