If the Fed Buys a $100,000 Government Security from a Bank

If the Fed buys a $100,000 government security from a bank when the desired reserve ratio is 20 percent and the currency drain is 5 percent, the bank can loan a maximum of

A) $75,000.
B) $80,000.
C) $100,000.
D) $95,000.
E) $85,000.