Answer:
a. they organized an air lift supplies that lasted almost a year
Step-by-step explanation:
The Berlin blockade which started on the 24th of June, 1948 and ended on the 12th of May, 1949 was a major international crisis that took place just after the World War II. The Soviet Union blocked supply of essentials to the western allies.
The United States and Britain responded to the Soviet blockade of Berlin by organizing an air lift supplies that lasted almost a year.