During the cold war which event occurred last?

I wonder what the options were ?

If there were no options, I can still tell you about the end of the Cold War.
One of the major events at the end of the Cold War was the Fall of the Berlin War: this is also often seen as the symbol for the end of the Cold War.

Other events include: Solidarity movement  in Poland, partially-Free elections in Poland in 1989, protests all over Eastern Europe and Declaration of Independence in the Baltic states