If the Required Reserve Ratio Is RR,the Simple Deposit Multiplier $\frac { 1 } { ( 1 - R R ) }$

If the required reserve ratio is RR,the simple deposit multiplier is defined as

A) $\frac { 1 } { ( 1 - R R ) }$ .
B) $\frac { 1 } { ( R R ) }$ .
C) $\frac { 1 } { ( R R ) }$ × change in bank reserves.
D) $\frac { 1 } { ( 1 - R R ) }$ × change in bank reserves.