While the allies were rebuilding europe the ussr blocked berlin, the result being:
a. a massive airlift
c. a minor war with the ussr
b. the loss of berlin to the ussr
d. an end to the blockade after military threat

While the Allies were rebuilding Europe the USSR blocked Berlin, the result being a massive airlift.The correct option among all the options provided in the question is option "a". The Berlin Blockade was the first crisis that the world saw during the period of Cold War. The Berlin Blockade took place between 24th of June 1948 to 12th of May in the year 1949.