The destruction of Berlin wall signified the end of cold war. Berlin wall was built in 1961 this is during the cold war. It separated West and East of Berlin. The relationship which was between USA and USSR after the end of world war two was called cold war.Different ideologies which were between systems of government, what the people thought about them and how they worked was shown by Berlin wall.
This one is tricky, because scientific law can explain an observation, or be used to make a prediction, but I believe that C. is the most correct of the 4 answers.
