Which of the Following Statements About Early Feudalism Is False

Which of the following statements about early feudalism is false?

A) Vassals were the same as serfs.
B) Vassals were obligated to serves their lords militarily.
C) The same person might be the vassal of a greater lord and the lord of lesser vassals.
D) A vassal was expected to serve in the lord's court of justice and to feed and house the lord and his traveling companions when required.
E) none of these choices