Simplify the Radical Expression $\sqrt{72 x^{2}}$ A) $6 \sqrt{2 x}$ B) $72 \mathrm{x}$

Multiple Choice

Simplify the radical expression. Assume all variables represent nonnegative real numbers.
- $\sqrt{72 x^{2}}$

A) $6 \sqrt{2 x}$
B) $72 \mathrm{x}$
C) $6 x$
D) $6 x \sqrt{2}$