How did justinian code have an impact beyond the byzantine empire?

it provided models for strong alliances between monarchs.

it organized ancient roman laws for use within the empire

it promoted trade among europe, the middle east, and asia

it later guided the development of present day international law.

The correct answer is

it later guided the development of present day international law.

Many medieval monarchs, including the Catholic Roman Empire, based their laws on this system. This system then inspired many philosophers to start debating politics and political systems and led to many key aspects that are nowadays used in international law.