Simplify the Expression $\sqrt { 3 x } + 2 \sqrt { 108 x } + 4 \sqrt { 75 x }$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $\sqrt { 3 x } + 2 \sqrt { 108 x } + 4 \sqrt { 75 x }$

A) $32 \sqrt { 3 x }$
B) $6 \sqrt { 186 x }$
C) $33 \sqrt { 3 x }$
D) $7 \sqrt { 186 x }$