Why Did Hitler Invade the Soviet Union

Why did Hitler invade the Soviet Union?

A) Hitler considered an eastern war inevitable eventually, and the USSR was the only potential British ally left on the Continent.
B) Hitler learned of imminent Soviet plans to attack German troops in Poland and sought to prevent it.
C) Hitler was concerned about German troops sympathizing with Soviet political ideals and was determined to eradicate them.
D) The Soviets were in conflict with the Germans regarding the treatment of Jews and undertook efforts to protect them.
E) The Soviet Union had a far smaller population than Germany did and would be an easy target.