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.

was serious about expanding its area of control in Eastern Europe.

would be able to set the Allied powers against one another.

would be able to swiftly defeat the Allied powers in any altercation.

The correct answer is B) was serious about expanding its area of control in Eastern Europe.

The Berlin blockade after WWII showed Europeans that the USSR was serious about expanding its area of control in Eastern Europe.

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. So yes, the Berlin blockade after WWII showed Europeans that the USSR was serious about expanding its area of control in Eastern Europe.

Answer

c. would be able to set the Allied powers against one another.