Why do you think the Allies decided to divide Germany into 4 zones of occupation?

So, the Soviet Union controlled the east half of Germany and had it under Communist rule. West Germany was divided among the Allies and had sectors controlled by the United States, England, and France.

I think:

To limit Germany's power. The Soviet Union would control about one-third of the country and the remaining two-thirds would be controlled by the United Sates, France, and Great Britain.