Answer:
b. Berlin Airlift.
Explanation:
The Soviet goal was to drive British, French and American forces out of West Berlin, which had been divided into four zones of occupation, just like the whole Germany. They thought that by blockading access to West Berlin and making it impossible to get food and other supplies, the Western Allies would leave and the Soviet Union would control all of the city. Nevertheless, US president Harry Truman refused to leave the city to its fate and ordered an airlift that lasted for one year. The Soviet policy was a failure.