Contains many principles that are found in Western legal systems, is the right answer.
The Code of Justinian is a large collection of statutes organised under the aid Byzantine emperor Justinian I. The work of compilation of these laws began after he took the throne of the Byzantine empire in the year 527. With its civil law tradition the Roman laws are the foundation for the European judicial orders.
The authority of the new provisional government was soon challenged by the Soviets, councils of representatives from the workers and Soldiers. I think the answers to your problem are Soviets and Soldiers. Brainlest?