Suppose banks are just meeting their reserve requirement of 25% andthe Fed sells

Suppose banks are just meeting their reserve requirement of 25% andthe Fed sells $30 billion in government securities to commercialbanks. The effect of this sale is to:A)increase excess reserves by $30 billionB)reduce excess reserves by $7.5 billionC)reduce the potential money supply by $90 billionD)reduce the potential money supply by $120 billion