Generally speaking, it would be that "D. European states had their borders clearly defined" that was an important outcome of the Congress of Vienna, since this increased stability in Europe after the Napoleonic Wars.
Switzerland was not an Allied Power of World War <em />I
Answer:
C
Explanation:
The new Bolshevik government were struggling to run the country as money was running low, people were starving, so they decided to back out of WW1, this made the other European countries see them as weak and not legit. In the conference after WW1 to decide what to do with Germany and the aftermath, Russia wasn't invited because they backed out of the war early.
Otto von Bismarck’s political actions were generally guided by the needs of the state. Happy to help!
It promoted the (relatively) rapid diffusion of immigrants, language, and domesticated crops and animals. Those factors are examined in excellent detail in Jared Diamond's book, "Germ, Guns and Steel" which I highly recommend for anyone studying the development of world cultures. It's a long read, but well worth it.