Write in Radical Form $7 x ^ { 1 / 5 }$

Multiple Choice

Write in radical form. Assume all variables represent positive real numbers.
- $7 x ^ { 1 / 5 }$

A) $\sqrt [ 5 ] { 7 x }$

B) $\sqrt [ 1 / 5 ] { 7 x }$

C) $\frac { 7 } { \sqrt [ 5 ] { \mathrm { x } } }$

D) $7 \sqrt [ 5 ] { \mathrm { x } }$