List at least four historical factors that prevented German unification until the late 19th Century.

Can't really help you on that question but I can tell you that history is not my favorite so I don't know nothing about it I don't pay attention in class butt when I do I learned a lot but today I had to write my brain but it was so late because I got all the answers and if you reread the problem you understand because you have to read it more than once her you don't understand it and it's kind of like what the Aryans did just a lot more to it