Select the correct answer. Why were nations such as Czechoslovakia, East Germany, Hungary, and Poland called satellite states of the Soviet Union? A. They were part of the Allied group during World War I. B. They were a threat to the Soviet Union's policy of expansion. C. They provided financial aid to the Soviet Union during World War II. D. They were dependent on and controlled by the nearby Soviet Union. E. They were the neighboring states of the Soviet Union.