Solve the Equation for the Specified Variable $P = \frac { \mathbf { r } - 1 } { \mathrm { It } }$

Multiple Choice

Solve the equation for the specified variable.
-I= Prt for P

A) $P = \frac { \mathbf { r } - 1 } { \mathrm { It } }$ .
B) P=r - It
C) $P = \frac { r - I } { 1 + t }$
D) $P = \frac { I } { r t }$