The byzantine influence can be seen in kiev’s government because
a) the legal code was created on the basis of byzantine law.
b) the justice system was set up to mimic the byzantine system.
c) the civil service exam to fill government positions came from the byzantines.
d) the authoritarian role of the tsar was based on the ruler of the byzantines.

The justice system of Kiev wasn't meant to mimic the Byzantine. In fact, not a lot of Byzantine influence can be found in the system itself. There was no civil service exam the way the Byzantines. The one thing that Kiev's government used as a basis, though, was the Byzantine Law.

So the answer is

A) the legal code was created on the basis of Byzantine law.

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