What were the German Einsatzgruppen?

A) mobile killing units that carried out the initial massacres of Jews
B) commando units that led the Blitzkrieg in 1940
C) advanced tanks used in World War II
D) commissars appointed to military units that ensured soldiers followed Nazi edicts
E) special units trained for desert warfare in North Africa

Early in his reign,whose approach to rule did Nikita Khrushchev denounce in a speech to the party congress?

A) Joseph Stalin's
B) Harry Truman's
C) Winston Churchill's
D) Clement Attlee's
E) Konrad Adenauer's