Final answer:
Justinian's Code of Laws served as a single, authoritative legal guide, by compiling Roman edicts and standardizing laws across the Byzantine Empire. Hence, the correct answer is option B.
Step-by-step explanation:
The best explanation of Justinian's Code of Laws, also known as the Code of Justinian, is that it allowed people to refer to one document as a legal guide. This monumental legal project, initiated by Emperor Justinian, was aimed at compiling and editing all Roman edicts issued from the second to the sixth century CE. The legacy of this code is significant as it became the foundation for many European legal systems and was instrumental in standardizing laws throughout the Byzantine Empire.
Unlike prior codes, such as the Theodosian Code, Justinian's Code resolved inconsistencies and reaffirmed Latin as the language of legislation. The Corpus Juris Civilis, as it is also known, helped to simplify legal proceedings and served as a comprehensive guide for legal matters, making the law more accessible and consistent.