Solve the Formula for the Specified Variable $I = \operatorname { Prt } \quad$

Multiple Choice

Solve the formula for the specified variable.
- $I = \operatorname { Prt } \quad$ for $\mathrm { P }$

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