Correct answer choice are :
A) Serfs worked land owned by the king
C) Knights served large landholders by defending their lands
E) A serf would work the land, a knight would protect it, a vassal would govern it, and the lord would reap the benefits.
Step-by-step explanation:
It took residues of old states, had an influence on succeeding history, had a decentralized governmental system determined to security, an agrarian economy, a culture penetrated by the military and a hierarchical political system.