Solve the Equation $$5 ^ { - x } = \frac { 1 } { 625 }$$

Multiple Choice

Solve the equation.
- $$5 ^ { - x } = \frac { 1 } { 625 }$$

A) $\left\{ \frac { 1 } { 4 } \right\}$
B) $\left\{ \frac { 1 } { 125 } \right\}$
C) $\{ 4 \}$
D) $\{ - 4 \}$