I think B is the best answer but I am not sure and I apologize beforehand if it is the incorrect answer.
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. Long story short, B. The Fall Of The Berlin Wall because that ended the Cold War
Answer:
Because their rate of reproduction is quite fast and because most cities haven't done anything about their Population for a long time meaning they have had a long time to expand their 'territory'
But what do I know, I live in a village
This was a policy that was meant to prevent the spread of communism. The United States enacted the policy of containment in at least two main ways. ... Thus, the US used military, political, and economic tools to try to prevent the spread of communism during the Cold War.