Respuesta :
The correct answer is C. Since there was political weakness and invaders, common people needed protection. To obtain this protection, they worked for military men in exchange. So, this created a feudal system of serfs (peasants who worked the land), vassals (who command serfs) and lords (those who controlled the vassals and serfs, and gave them protection).
Answer:
c) Vikings, Muslims, and Magyars invaded Europe at a time of political weakness.
Is the correct answer
Explanation: