Answer:
The correct answer is: letters "B", "C" and, "D" are false.
Explanation:
Feudalism was system -in the Middle Ages- based on cooperation among peoples in exchange of land for labor. In its structure, there were serfs, who worked the land owned by the king; the knights, who defended the landholder's territory; a vassal, who would govern the fief (land given to the vassal) but not own it and; the Lord, who would benefit from the work of the cooperative community.
