The soviet blockade of west berlin in 1948 was designed to prevent

D) People and supplies from entering or leaving West Berlin.

Explanation:

Berlin Blockade was intempted to prevent people and supplies from entering or leaving West Berlin into French, British and American zones of occupation. Soviets had controlled most of the access by land, so Europeans began a series of airlift to provide supplies and communicate with West Berlin.

The isolation of West Berlin resulted in a eventual formation of a West Germany, as a capitalist counterpart to the Socialist East of Germany with Berlin being the communist capital and Bonn on the other hand as two competing capitals in a divided nation.

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explanation: