Final answer:
If the United States and Great Britain had not used an airlift to help the people in Berlin during the Soviet blockade, Berlin might have fallen to the Soviet Union, the Cold War might have escalated further, and a humanitarian crisis might have occurred in Berlin.
Step-by-step explanation:
If the United States and Great Britain had not used an airlift to help the people in Berlin during the Soviet blockade, several things might have happened. First, Berlin might have fallen to the Soviet Union (option a). Without the airlift, the Soviet blockade could have forced the Western Allies to give up and allow the Soviets to take over the city. Second, the Cold War might have escalated further (option b). The Berlin Airlift was a demonstration of American and British commitment and resolve against Soviet aggression. If the airlift had not been successful, it could have led to a more aggressive response from both sides and further escalation of the Cold War. Lastly, a humanitarian crisis might have occurred in Berlin (option c). The Soviet blockade cut off all land routes, making it impossible to bring in essential supplies such as food and fuel. Without the airlift, the people of Berlin would have been left without these necessities, leading to a humanitarian crisis.