What was one significant indication that the european feudal system was effective?

similar systems developed in china and japan.
european peasants voted to keep the system in place.
invaders did not manage to attack europe.
the system put an end to the roman empire.

Round arches allowed the romans to create structures with

Who was the leader of the black nationalists in the 1920s?

Which of the following is an example of the pull factor known as economic migration? a. better educational opportunities pulling people towards a new country b. mexican laborers entering the us to work in agricultural jobs c. joining family members that are already in a new country d. crop failures driving people away from their country i am unsure on this question, i was thinking b? but i could be wrong.