This answer to this problem is 64
The Zollverein was an economic union of 30 states. The correct option among all the options given in the question is option "b". Zollverein is actually a coalition of German states whose main agenda was to manage the tariffs and all the economic policies within the German territories. Later on it expanded to other European countries as well.
THE ANSWER IS C mostly and if thats incorrect its probably the last one btw i like your username itss cool:)
