Assuming that Erlitou was the capital of the Xia Dynasty, which one of the following is not correct based on the archaeological evidence?
a) Workshops indicate a Bronze Age civilization.
b) Burial sites indicate an egalitarian social structure, where farmers and ruling elites interacted as equals.
c) Workshops were used to produce pottery.
d) A central, walled palace complex points to a further stage in state development along the Yellow River, from chiefdoms to the first kingdom.