In 1871, Hundreds of Principalities Were United to Form Germany

In 1871, hundreds of principalities were united to form Germany. After defeat in World War I, Germany's government was known as the Weimar Republic until the Nazis came to power in 1933. With the defeat of Nazi Germany, the country was divided into East and West during the cold war, and finally reunited when the Soviet Union collapsed. Germany has existed in many forms, demonstrating what characteristic of states?

A) Most were formed before World War I.
B) They are uniquely constructed and constantly reshaped.
C) They are only a collection of symbols.
D) They remain the same over time.