Rewrite the Expression with a Rational Exponent $\sqrt [ 5 ] { 9 x ^ { 6 } y }$

Multiple Choice

Rewrite the expression with a rational exponent.
- $\sqrt [ 5 ] { 9 x ^ { 6 } y }$

A) $\frac { 1 } { 5 } \cdot \left( 9 x ^ { 6 } y \right)$
B) $\left( 9 x ^ { 6 } y \right) ^ { 1 / 5 }$
C) $\left( 9 x ^ { 6 } y \right) ^ { 5 }$
D) $\frac { 1 } { \left( 9 x ^ { 6 } y \right) ^ { 5 } }$