The correct answer is B) the Justinian Code.
A byzantine made version of the ancient Roman legal code became known as the Justinian code.
One of the most important reforms in the Byzantine Empire was the Corpus of Civil Law, better known as the Justinian Code. The promoter, Emperor Justinian 1 in the year 528. Under the counseling of legal advisors, Justinian ordered scribes to write the code with new laws for the Byzantine Empire. Justinian thought that the old laws from the Western Roman Empire were not the best for the Byzantine Empire.