Question

which title expressed the emperors divine authority at the top of han society? sage of people lord of grain mandate of land son of heaven

Explanation:

In Han society, the title "Son of Heaven" was used to express the emperor's divine authority, as it implied a connection to the heavens and a divine right to rule. The other options do not relate to expressing divine authority: "Sage of People" is not a relevant imperial title for divine authority, "Lord of Grain" relates to agricultural leadership, and "Mandate of Land" is not a correct title (the relevant concept is "Mandate of Heaven", but the option here is misphrased and not the title for the emperor's divine authority in the same way as "Son of Heaven").

Answer:

D. Son of Heaven