Mr Garrison Has Recently Obtained a Bank Card from South

Mr. Garrison has recently obtained a bank card from South Park National Bank. Excited about the concept of using a little plastic card to get money from a machine, he quickly runs down to the nearest Automatic Teller Machine and withdraws $500. This action has

A) increased the money supply by $500.
B) reduced the money supply by $500.
C) reduced the bank's required reserves by $25 assuming the reserve ratio is 5 percent.
D) not changed the money supply.