Simplify the Exponential Expression $\frac { \left( 3 x ^ { 1 / 3 } \right) ^ { 4 } } { x ^ { - 6 / 5 } }$

Multiple Choice

Simplify the exponential expression. Write any negative exponents as positive exponents. Assume all variables represent positive real numbers.
- $\frac { \left( 3 x ^ { 1 / 3 } \right) ^ { 4 } } { x ^ { - 6 / 5 } }$

A) $3 x ^ { 2 / 15 }$
B) $3 x ^ { 38 / 15 }$
C) $81 x ^ { 38 / 15 }$
D) $81 x ^ { 2 / 15 }$