Simplify the Radical Expression $\frac { \sqrt [ 3 ] { 135 a ^ { 4 } b ^ { 6 } } } { \sqrt [ 3 ] { 5 a } }$

Multiple Choice

Simplify the radical expression. Assume that all variables represent positive real numbers.
- $\frac { \sqrt [ 3 ] { 135 a ^ { 4 } b ^ { 6 } } } { \sqrt [ 3 ] { 5 a } }$

A) $3 a b ^ { 2 } \sqrt [ 3 ] { 3 a b }$
B) $3 a b ^ { 4 } \sqrt [ 3 ] { 3 a ^ { 2 } }$
C) $3 a ^ { 2 } b ^ { 4 }$
D) $3 a b ^ { 2 }$