"Suppose the banks in the Federal Reserve System have $30 billion in transaction accounts, the required reserve ratio is 0.15, and there are no excessive reserves in the system. If the required reserve ratio is changed to 0.10, then the amount of excessive reserves would be?
A) Negative $3.0 Billion
B) Negative $1.5 Billion
C) $1.5 Billion
D)$3.0 Billion