Solve the Formula for T $A = P + P r t$

Multiple Choice

Solve the formula for t .
Simple interest formula: $A = P + P r t$

A) $\mathrm { t } = \frac { 1 } { \mathrm { r } } \left( \frac { A } { P } + 1 \right)$
B) $\mathrm { t } = \frac { 1 } { \mathrm { P } } \left( \frac { A } { \mathrm { r } } - 1 \right)$
C) $\mathrm { t } = \frac { 1 } { \mathrm { P } } \left( \frac { A } { \mathrm { r } } + 1 \right)$
D) $\mathrm { t } = \frac { 1 } { \mathrm { r } } \left( \frac { A } { P } - 1 \right)$
E) none of these