A. prove the legitimacy of dynastic rule is your answer
Mandate of Heaven was the saying that there should only be one ruler, which the gods approve of. This would rule out B) and D). Because the ruler is approved by the gods, it means that all should obey the appointed king.
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<span>Differences between the North (abolitionist) and South (pro-slavery)</span>
Generally speaking, a "mixed" economic system can be characterized by some government involvement and private ownership of most business, since some government regulation ensures the protection of the consumers.
I’m just guessing and I’m going with B because I heard something about them getting threatened but if not I’m sorry