Problems after World War I, This was one of the most important Many countries in Europe struggled with
long-term causes of World War IL
a medical
b, educational
Gimmigration
d. economic

I think the answer might be economic. This is because Russia was the first country to drop out of the war because they ran out of supplies which therefore led to a revolution. The Treaty of Versailles really messed up the German economy because they had to limit their strength of their miltiary and had to pay a ton of money for the war damage. This led to Germany printing more money which led to hyper-inflation. This therefore led to Hitler taking power and starting ww2.

Explanation:

the process is called revolution because it was a process of great economic-social transformations that began in england in the xviii century.

the industrial mode of production spread throughout much of the northern hemisphere throughout the xix and early xx centuries.

the effect of this revolution was the distance between the countries, with respect to economic and political power.   after all, not all industrialized at the same time, remaining in the condition of suppliers of raw materials and agricultural products to the industrialized countries.

these differences mark to this day the nations of the world that are divided between developed and developing countries. one way to measure whether a country is advanced is to assess how industrialized it is.