Rationalize the Denominator $-\sqrt{\frac{245 \mathrm{x}^{3}}{\mathrm{y} 5}}$ A) $-\frac{7 x \sqrt{5 x y}}{y^{3}}$

Multiple Choice

Rationalize the denominator. Assume that all variables represent positive real numbers.
- $-\sqrt{\frac{245 \mathrm{x}^{3}}{\mathrm{y} 5}}$

A) $-\frac{7 x \sqrt{5 x y}}{y^{3}}$

B) $-\frac{7 x}{y^{2}} \sqrt{\frac{5 x}{y}}$

C) $-\frac{7 x^{3} \sqrt{5}}{y^{5}}$

D) $-\frac{x \sqrt{245 x y}}{y^{3}}$