Sorry answering this late but yes your answer is correct! C
The Answer will be choice b
Because they were being governed by an unjustly government who used their powers to an abusive extent from over taxations to not caring about what the colonists wanted.
Answer: The Berlin Blockade of 1948 to 1949 marked the beginning of the Cold War, the building of the Berlin Wall in 1961 represented the high point of tensions and the opening of the Wall in 1989 represented the end of Cold War tensions.