Answer:
C. it has more power to affect the economy than any other institution
Step-by-step explanation:
The FED manages the monetary policy affecting the economy's money supply. This in turn affects interest rates directly. It also has an enormous indirect influence on economic growth (it can stimulate it or cool it), currency value, value of stock markets, unemployment (directly related to economic growth), etc.
The FED is probably the institution that influences the economy the most.