Write in Radical Form $2 x ^ { 1 / 3 }$

Multiple Choice

Write in radical form. Assume all variables represent positive real numbers.
- $2 x ^ { 1 / 3 }$

A) $\sqrt [ 1 / 3 ] { 2 x }$
B) $\sqrt [ 3 ] { 2 x }$
C) $2 \sqrt [ 3 ] { x }$
D) $\frac { 2 } { \sqrt [ 3 ] { x } }$