The correct answer is A) challenge the United Nations to see if it was willing to take action.
The Berlin blockade after World War II showed Europeans that the USSR wanted to challenge the United Nations to see if it was willing to take action.
Those were the tense years of the Cold War in which the United States and the Soviet Union competed in almost everything.
In 1948, the Soviet Union attempted to impede the access to the Allies to their part of Berlin, by blocking the roads to and from the positions that Russia had occupied in East Germany. The option that France, the United States, and Great Britain found to resolve the problem and eliminate the possibility of a direct confrontation was to send supplies by air during a year. That is they decide to transport food and supplies to Western Germany for almost a year.