Answer:
{A}To legitimize his claim to rule China as emperor through divine sanction
Explanation:
A. is the correct answer. Mandate of Heaven is the teaching that says the ruler of China has the divine power from the gods and makes him the “Son of Heaven”. King Zheng adopted this idea after he took the Zhou’s dynasty’s place and started the Qin dynasty in order to have his rulership as the emperor seen as the divine intervention.
B. is not a true answer. Mandate of Heaven has nothing to do with Daoism.
C. is not the correct answer. Mandate of Heaven is not about massive temples and their justification.