Which of the following helped lay the foundation for the rise of fascism in Europe in the years after WWI? The Bolshevik Revolution in Russia
The harsh conditions imposed by the Treaty of Versailles and an economic depression
С
The brutal treatment of the Nazi's by Jews, Poles, and the Americans.
The political division of Western and Eastern Europe.

B- The harsh conditions imposed by the Treaty of Versailles and an economic depression

Explanation:

The treaty of Versailles left many countries extremely poor, and wanting more land that they didn't get. Many times when there is a problem in a country, everyone blames a group of people even if they did nothing, which is what happened with the Nazis blaming Jewish people for the economic depression. Hard times made people be more proud of their country, which then turned into nationalism.