Answer:
B) The laws of the empire were organized into a comprehensive collection.
Step-by-step explanation:
The accurate description of the Byzantine Empire under the reign of Justinian the Great is B) The laws of the empire were organized into a comprehensive collection.
During Justinian's reign, he implemented significant legal reforms and commissioned a systematic compilation and codification of Roman laws known as the "Justinian Code" or "Codex Justinianus." This comprehensive collection of laws served as the foundation for Byzantine law and had a lasting impact on legal systems in Europe.
The other options are not accurate descriptions of the Byzantine Empire under Justinian's reign. The population of the empire did not decrease significantly (A), internal conflict and political riots were indeed a concern (C), and economic and cultural isolation did not lead to the decline of Constantinople and surrounding cities (D).