The roman empire and han china were similar in that
a) they both had a state sponsored religion that them to govern. b) they both used a strong centralized government to control a large area.
c) they both controlled part of modern day iran at the height of their power.
d) they both attempted to remain isolated in order to maintain cultural unity.

The Roman Empire and Han China were similar in:

(B) They both used a strong centralized government to control a large area.

At the height of their power, these two great empires controlled most of the world.

They both had famous emperors who marked history. They were:

These two great emperors had all the powers and ruled from the cities that were the center of their empires.

The explanation of why other answers are wrong:

(A): The two empires were polytheistic. They believed in many gods, but religion was not the main way that helped them to govern.

(C): Modern Iran has never been under the control of these two empires.

(D) The Roman Empire and Han China were not isolated. There were a lot of trades between them across the Silk Road.

Subject: History

Chapter: Roman Empire

Keywords: Han China, the Roman Empire, the Silk Road, the similarity between the Roman empire and China Han.

the answer would be choice c, cave paintings.