Answer: C. An Airlift
Step-by-step explanation: Stalin hoped that by ordering all supplies coming into West Berlin by road, rail, or water, be stopped, the West Berliners would face starvation, forcing the United States and its allies to give up their part of Berlin. But Truman decided he could not afford to let West Berlin fall into Stalin's grip. So countered Stalin's order with an ambitious rescue mission known as the Berlin Airlift. Where thousands of huge cargo planes carried food, fuel, and other needed supplies into the city.
(Source- Volume 3: The Human Odyssey, From Modern Times to Our Contemporary Era).