Three options: copper gold land
Yes, Unitary is like Russia. Ruled by one leader or dictator.
C. The continental system
The answers are A and E.
Option A) Orderly clashes, since holiday tournaments were hosted by nobles. The main purpose of the battles were to show skills and techniques, many knights could die due to injuries, that is why mortal combats, Option E), could happen.
The Roman government like the US's had 3 branches consisting of a legislative branch, an executive branch, and a judicial branch. there are many more similarities but this is the main one. Hope it Helps