The reasons are as follows

A hereditary system does not meet the meaning of the question, so it can be ruled out first.

B enfeoffment system corresponds to that the world belongs to Zhou, because Zhou is the world's co-owner, and the vassal's land is enfeoffed by the emperor. The whole world is not a place of kings. So the world belongs to Zhou.

The patriarchal clan system of C corresponds to the sect returning to the world, because the Emperor of Zhou is the best in the world, and other governors are all small clansmen, and the small clansmen revolve around the big clansmen, so it is a sect returning to the world.

D the system of rites and music is to establish a strict hierarchical order through different levels of rites and music. Let the princes of the world consciously and voluntarily abide by their duties and obligations in accordance with the rites and music system of the Zhou Emperor.