Write the Expression in Radical Form $x ^ { 1 / 5 }$

Multiple Choice

Write the expression in radical form. Assume that all variables represent positive real numbers.
- $x ^ { 1 / 5 }$

A) $\sqrt { 5 x }$
B) $- \sqrt [ 6 ] { x }$
C) $\sqrt [ 6 ] { x }$
D) $\sqrt [ 6 ] { \frac { 1 } { x } }$