It was changed I guess by 1935
The correct answer for this question is D.
Around this time, Feudalism WAS being used in this area, so that statement is false.
There are multiple things that caused the beginning of World War I. However, there was a certain event that pushed the power of Europe on its edge and that was when Archduke Ferdinand was assassinated. This is the reason why Europe was being caught in the World War I.