Write in Radical Form $x ^ { 1 / 8 }$

Multiple Choice

Write in radical form. Assume all variables represent positive real numbers.
- $x ^ { 1 / 8 }$

A) $\frac { 1 } { \sqrt [ 8 ] { x } }$
B) $\sqrt { x ^ { 8 } }$
C) $\sqrt [ 8 ] { x }$
D) $x ^ { - 8 }$