Rationalize the Denominator and Simplify $\sqrt [ 4 ] { \frac { 81 } { 25 x ^ { 15 } } }$

Multiple Choice

Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
- $\sqrt [ 4 ] { \frac { 81 } { 25 x ^ { 15 } } }$

A) $\frac { 3 \sqrt [ 4 ] { 25 x ^ { 3 } } } { 5 x ^ { 4 } }$
B) $\frac { 3 \sqrt [ 4 ] { 25 x } } { 5 x ^ { 3 } }$
C) $\frac { 3 \sqrt [ 4 ] { 25 x } } { 5 x ^ { 4 } }$
D) $\frac { 3 \sqrt [ 4 ] { 25 x ^ { 3 } } } { 5 x ^ { 3 } }$