When the western allies created west germany as a nation in 1948, how did the soviet union respond?

They built a wall separating East and West Berlin.

Explanation: Germany was divided into occupation zones. The United States, Great Britain, the Soviet Union, and, eventually, France, were given specific zones to occupy in which they were to accept the surrender of Nazi forces and restore order. The Soviet Union occupied most of eastern Germany, while the other Allied nations occupied western Germany. The German capital of Berlin was similarly divided into four zones of occupation.

the answer is !

i think its the outcome of people's preferences.