Answer:
A. The separation of powers
Explanation:
The Spirit of the Laws was the book that described a version of Roman government that used the separation of government's power into independent branches as a main principle.
The Federal Reserve is responsible for money related arrangement for the United States. Fiscal arrangement needs to do with controlling the supply of cash to either help the economy or moderate it. For this situation, the economy is not doing all around ok.
The best one (I think) that falls with the setting provided would be
A. The main character proves his loyalty by thwarting an attempt on the kings life.
My reasoning is the king resides in a castle.
Hope this helps!