Which of the following was a characteristic of all classical empires?
a) there was equality under the law for all subjects.
b) emperors were constrained by the mandate of heaven.
c) they all imposed a single religion and language for the empire.
d) they were powerful states capable of coercing resources from subjects.

Option: d) They were powerful states capable of coercing resources from subjects.

Explanation:

All the classical empires build with powerful states along with the army, which helped them gaining control over small weak states and expand their territories by building greater empires. The empires were famous for persuading others who lost the war by imposing laws to provide resources (taxes and food) in helping to build the empire flourish and prosper.