The Roman Empire and Han China were similar in that

Responses
A they both had a state sponsored religion that helped them to govern.they both had a state sponsored religion that helped them to govern.
B they both used a strong centralized government to control a large area.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.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.they both attempted to remain isolated in order to maintain cultural unity.

B they both used a strong centralized government to control a large area.

B they both used a strong centralized government to control a large area.

To determine the correct answer, we need to compare the Roman Empire and Han China in terms of their similarities.

Option A states that they both had a state-sponsored religion that helped them govern. To verify this, we can research the religions practiced in both civilizations and see if they were indeed state-sponsored and influential in governance.

Option B suggests that they both used a strong centralized government to control a large area. To confirm this, we can examine the political structures and systems of both the Roman Empire and Han China to see if they had a centralized government and controlled significant territories.

Option C claims that they both controlled part of modern-day Iran at the height of their power. To confirm this, we need to research the territorial extent of both civilizations and determine if Iran was under their control during their respective peaks.

Option D implies that they both attempted to remain isolated to maintain cultural unity. Researching historical events and policies of both civilizations should reveal if they indeed pursued isolation to preserve their cultures.

By delving into historical records and scholarly sources, we can gather the necessary information to validate one of these options as the correct answer.