Rewrite the Expression with a Rational Exponent $\left( \sqrt [ 7 ] { 2 x ^ { 2 } y } \right) ^ { 8 }$

Multiple Choice

Rewrite the expression with a rational exponent.
- $\left( \sqrt [ 7 ] { 2 x ^ { 2 } y } \right) ^ { 8 }$

A) $\frac { \left( 2 x ^ { 2 } y \right) ^ { 7 } } { 8 }$
B) $\left( 2 x ^ { 2 } y \right) ^ { 8 / 7 }$
C) $\left( 2 x ^ { 2 } y \right) ^ { 7 / 8 }$
D) $\frac { \left( 2 x ^ { 2 } y \right) ^ { 8 } } { 7 }$