Which item describes an accurate cause-and-effect relationship that existed after the fall of the roman empire

A. Decline in trade → shift to a rural society

B. Germanic tribes invading Roman territories → strengthening of central government

C. Increasing urban populations → Germanic tribes invading Roman territories  

D. Shift to a rural society → strengthening of central government

Explanation:

its A. just took test

nationalization is the set of dispositions and operations by means of which the state assumes, in varied form, the administration of private companies, of groups of companies or of the totality of certain economic sectors previously managed by individuals, such as the land portions. nationalization is the opposite of privatization. it is also called nationalization of the means of production, although a nationalized company can be previously both national and foreign ownership. nationalization or nationalization is a very characteristic action of ideologies such as socialism and nationalism.