What Was the Social and Political Organization of Japan Prior

What was the social and political organization of Japan prior to the 5th century C.E.?

A) Japan was divided into regional kingdoms with autocratic rulers who dominated the social organization.
B) Japan was organized into a single empire under an autocratic ruler supported by a powerful priesthood.
C) Japan was divided into hundreds of clans dominated by a small warrior aristocracy.
D) Japanese society was unable to move beyond hunting and gathering bands prior to the fifth century C.E.