Simplify the Expression $( 8 x y ) ^ { 4 }$

Multiple Choice

Simplify the expression. Assume all variables represent nonzero real numbers.
- $( 8 x y ) ^ { 4 }$

A) $32 x ^ { 4 } y ^ { 4 }$
B) $4096 \mathrm { x } ^ { 4 } \mathrm { y } ^ { 4 }$
C) $4096 x y$
D) $32 x y$