Simplify the Expression $$3 \sqrt [ 3 ] { 125 x } + 3 \sqrt [ 3 ] { 64 x }$$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $$3 \sqrt [ 3 ] { 125 x } + 3 \sqrt [ 3 ] { 64 x }$$

A) $3 \sqrt [ 3 ] { 189 x }$
B) $9 \sqrt [ 3 ] { x }$
C) $27 \sqrt [ 3 ] { x }$
D) $27 x$