Byzantine emperor justinian's most significant political accomplishment was
a) codifying roman law.
b) defeating the roman empire.
c) defeating invaders from the south.
d) restoring the empire to its previous size.

Byzantine Emperor Justinian's most significant political accomplishment was codifying Roman law. Roman law is the constitutional system of old Church which has the right expansions crossing over a thousand years. It was the constitution from the Twelve Tables to the Corpus Juris Civilis organized by Eastern Roman Emperor Justinian. Roman law establishes the fundamental structure for civil law which is the most widely used.

me on my last question.