Final answer:
Germany was divided after World War II to prevent it from becoming an international threat. Each of the Allied nations took control of a zone, aiming to demilitarize, democratize, and rebuild the country while preventing the resurgence of militarism and extremism.
Step-by-step explanation:
After World War II, Germany was divided into four occupation zones primarily to keep Germany from becoming an international threat (option a). This division was implemented by the allied nations—Britain, France, the United States, and the Soviet Union—each controlling a zone.
Through the Potsdam Agreement, these measures aimed to demilitarize Germany, abolish the National Socialist Party, and reorganize the nation's economy towards agriculture and nonmilitary industries. An Allied Control Council was established to administer Germany collectively, but this approach eventually faced issues due to the unanimity requirement for decisions and growing tensions between the democratic West and the communist Soviet Union.
These disagreements and the strategic importance of Germany in the postwar recovery and as a bulwark against communism led to the eventual establishment of two separate German nations, commonly known as East Germany and West Germany. The different ideologies and approaches to governance by the occupying powers reflected broader geopolitical tensions that culminated in the Cold War.
The Berlin Declaration on June 5, 1945, formalized the split of Germany and its capital, which became a focal point of the Cold War's ideological and political struggles, influencing European recovery and stability.