How Did the Agreements Reached at the Yalta and Potsdam

How did the agreements reached at the Yalta and Potsdam conferences in 1945 shape the future of postwar Germany?

A) The United States and the Soviet Union divided Germany into two halves, with the Soviets occupying the eastern half and the United States occupying the western half.
B) The four major Allied powers agreed to a vast anti-fascism project to reprogram German attitudes and help remake Germany into a functioning democracy.
C) The Allies divided Germany into four zones, each of which was controlled by one of the four principal victors in the war and occupied by troops from those nations.
D) Stalin ceded control of Germany to the United States, Britain, and France in return for having free reign over nearly all of eastern Europe.