Answer:
The 3rd option.
Explanation:
The Warsaw Pact, so-named because it was established in Warsaw, was a military alliance between the Soviet Union and client states of Poland, East Germany, Czechoslovakia, Hungary, Romania and Bulgaria. It allowed the Soviet Union to maintain forces in eastern Europe and organized forces of in the client states. The alliance was largely symbolic, as the Soviet Union dictated policy. It allowed the Soviet Union to maintain control of eastern Europe during the Cold War, but democratic revolutions in the client states in 1989 inspired similar revolutions in the Soviet Union. The Warsaw Pact and the Soviet Union both collapse in 1991.
