Which factor constantinople and the byzantine empire outlast the roman empire by nearly a thousand years?

The factors which helped Constantinople and the Byzantine Empire to outlast the Roman Empire by nearly a thousand years were Constantinople's walls, which lasted nearly a thousand years and made the Empire's center of economy and culture extremely difficult to invade, the Justinian code (Law code that endured almost a thousand years), lack of money consuming measures like the bread and circuses, strategic location of Constantinople for the commerce and culture and the fall of the Roman Empire which led barbarian's attention elsewhere.

Explanation:

The Byzantine Empire had natural defenses that made it difficult to attacks

the economic difference between the three colonial regions. shipbuilding, whaling, fishing, and trapping where also main factors to the economy. the southern regional colonies economy was based on sugarcane, rice, cotton, tobacco, and indigo.

answer; i believe the correct answer is (117);