Byzantine Emperor Justinian's MOST significant political accomplishment was

Responses
A codifying Roman law.codifying Roman law.
B defeating the Roman Empire.defeating the Roman Empire.
C defeating invaders from the south.defeating invaders from the south.
D restoring the empire to its previous size.

A codifying Roman law.

A codifying Roman law

The most significant political accomplishment of Byzantine Emperor Justinian was A) codifying Roman law. Justinian's codification of Roman law is known as the Corpus Juris Civilis or the Justinian Code. This was a comprehensive collection and systematization of existing Roman laws and legal principles, which had a profound impact on later legal systems throughout Europe.

To find this answer, one can study the history of the Byzantine Empire and the reign of Emperor Justinian. This can be done by consulting historical books, articles, or online resources that focus on the Byzantine Empire and the achievements of Justinian. Additionally, one can also examine primary sources from the time, such as Byzantine chronicles or Justinian's own legal reforms and writings.