based on my research, it must be c. plush conditions
I believe the answer is A. Production increased due to the demand for goods worldwide.
The Chinese first emperor united China by force. He governed by the concept of legalism which advocated clear rules and heavy penalties as a way of enforcing the state authority. On the other hand the Roman emperors ruled with a concept of people are good and therefore need to be good.
During the colonial era, the ministers were placed on the higher spot in the social hierarchy compared to doctors and lawyers because back then people still believed that following the word of the bible is crucial in creating a successful society.
In the modern era, this type of thinking started to be debunked which make doctors and lawyers placed higher in the social hierarchy.