Simplify the Radical Expression $\sqrt [ 3 ] { 54 }$

Multiple Choice

Simplify the radical expression. Assume all variables represent positive real numbers.
- $\sqrt [ 3 ] { 54 }$

A) $3 \sqrt [ 3 ] { 6 }$
B) $3 \sqrt [ 3 ] { 2 }$
C) 3
D) 6