Write in Radical Form $( - 2 x ) ^ { 1 / 5 }$

Multiple Choice

Write in radical form. Assume all variables represent positive real numbers.
- $( - 2 x ) ^ { 1 / 5 }$

A) $\frac { 1 } { \sqrt [ 5 ] { - 2 x } }$
B) $\sqrt { - \frac { 2 x } { 5 } }$
C) $\sqrt [ 5 ] { - 2 x }$
D) $\sqrt [ 1 / 5 ] { - 2 x }$