Rewrite the Expression with a Rational Exponent $\sqrt [ 7 ] { x y ^ { 2 } }$

Multiple Choice

Rewrite the expression with a rational exponent.
- $\sqrt [ 7 ] { x y ^ { 2 } }$

A) $\left( x y ^ { 2 } \right) ^ { 7 }$
B) $\left( x y ^ { 2 } \right) ^ { 1 / 7 }$
C) $\frac { 1 } { \left( x y ^ { 2 } \right) ^ { 7 } }$
D) $x ^ { 1 / 7 } y ^ { 2 }$