Most historians tend to agree that the term 'feudalism' a. should be restricted to European history. b. can be a useful tool for the comparative study of societies. c. should be restricted to Japanese history. d. should be restricted to European and Chinese history. e. is outmoded and does not reflect the modern comparative emphasis in history.

b. can be a useful tool for the comparative study of societies.

Explanation:

There were several feudal societies around the world at some point or the other which means that the practice was not limited to Europe. It also existed in countries like China and Japan for instance.

Feudalism can therefore be used to compare these different societies that have gone through it in order to understand their history better as well as that of human progression in general.

it refers to race, i am pretty sure this was a popular term in nazi germany or something.

idk