Which of the Following Best Describes the Mandate of Heaven

Which of the following best describes the Mandate of Heaven?

A) the idea that Chinese rulers were divine beings themselves
B) the idea that only priests and other religious leaders could rule in China
C) the idea that Chinese rulers derived their authority from a divine force that could be revoked if rulers behaved poorly toward their subjects
D) the idea that Chinese rulers were endowed with their authority by a divine force, and no human could overthrow a ruler once approved by the heavens