Answer: A) Codifying, editing, and updating Roman laws
Explanation: The Emperor Justinian (483 - 565) was the Byzantine ruler in the period from 527 to 565. As the Byzantine emperor maintained successfully under his control the territory of the Eastern Roman Empire, he expanded his rule in some territories of the former Western Roman Empire, and is also known and by his law, called Justinian's code. It is a law that represented the amended and adapted Roman law, and it was in force from 529 to 565, as a set of legal interpretations of the Roman law.