Simplify the Expression Without a Calculator $$- \sqrt { \frac { 75 x ^ { 4 } y } { 3 x ^ { 2 } y } }$$

Multiple Choice

Simplify the expression without a calculator. Assume variables are positive. $$- \sqrt { \frac { 75 x ^ { 4 } y } { 3 x ^ { 2 } y } }$$

A) $- 5 x$
B) $25 y$
C) $75 x ^ { 2 }$
D) 6
E) $\frac { 75 } { 3 } x$