Which of the following make the reunification of germany possible

The end of the cold war made the reunification of Germany possible. The unification in 1990 involved, the German Democratic Republic which became part of Federal Republic of Germany after Berlin reunited to a single city. 
The fall of the Berlin wall, Helmut Kohl's initiative, and the international corporation between Soviet Union, Western Europe, and the United States made it possible for the unification of Germany, which further encouraged peaceful negotiation that brought the cold war to an end. 

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