What part of WWII do you feel has had the most lasting impact on the world? (Technology, the legacy of the Holocaust, Nuclear Warfare, the beginning of the Cold War, etc.)

The holocaust of world war ii resulted in a) the nazis effectively used propaganda to gain and hold power in germany. b) ethnic regimes carried out mass devastation. c) deporting all european jews to the island of madagascar. d) the systematic mass slaughter of european jews and and others in nazi concentration camps during world war ii.