Simplify the Expression $\left( 4 x ^ { 4 } \right) ^ { \frac { 3 } { 2 } }$

Multiple Choice

Simplify the expression. All variables represent positive real numbers. $\left( 4 x ^ { 4 } \right) ^ { \frac { 3 } { 2 } }$

A) $\left( 2 x ^ { 2 } \right) ^ { 3 }$
B) $8 \left( x ^ { 4 } \right) ^ { \frac { 3 } { 2 } }$
C) $8 x ^ { 6 }$
D) $8 x ^ { 12 }$
E) $8 x ^ { 2 }$