Simplify Assume All Variables Represent Nonnegative Values $\sqrt{\frac{63 \mathrm{a}^{2} \mathrm{~b}}{\mathrm{c}^{2}}}$ A) $\frac{3 \sqrt{7 a^{2} b}}{c}$

Multiple Choice

Simplify. Assume all variables represent nonnegative values.
- $\sqrt{\frac{63 \mathrm{a}^{2} \mathrm{~b}}{\mathrm{c}^{2}}}$

A) $\frac{3 \sqrt{7 a^{2} b}}{c}$

B) $\frac{9 a \sqrt{7 b}}{c}$

C) $\frac{a \sqrt{63 b}}{c}$

D) $\frac{3 a \sqrt{7 b}}{c}$