If P Equals the Price Level Expressed as an Index $\$ V$

Multiple Choice

If P equals the price level expressed as an index number and $\$ V$ equals the value of the dollar, then

A) $P = \$ V - 1$
B) $\$ V = 1 / P$
C) $1 = \$ V / P$
D) $\$ V = P - 1 .$