Which of the following are the basic features of Eric Hobsbawm's theory of nationalism in Europe?

A. There are three phases of nationalism that have shaped states in Western countries.

B. He defines nationalism, for instance as reinventing traditions.

C. He identifies petty bourgeoisie as a group that advocated separatist nationalism.

D. He ignored the emergence of ethno-lingustic nationalism in East and West Europe.

Choose the correct answer from the options given below: