Simplify the Expression $\sqrt { 5 x } + 7 \sqrt { 125 x } + 4 \sqrt { 80 x }$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $\sqrt { 5 x } + 7 \sqrt { 125 x } + 4 \sqrt { 80 x }$

A) $51 \sqrt { 5 x }$
B) $52 \sqrt { 5 x }$
C) $12 \sqrt { 210 x }$
D) $11 \sqrt { 210 x }$