Rút gọn phân thức

Câu hỏi: Rút gọn phân thức $\frac{{\text{5x}}^{\text{2}}-\text{10xy}+{\text{5y}}^{\text{2}}}{{\text{x}}^{\text{2}}-{\text{y}}^{\text{2}}}$  ta được?

A. $\frac{\text{x}-\text{y}}{\text{5(x}+\text{y)}}$

B. $\frac{\text{5(x}-\text{y)}}{\text{x}+\text{y}}$

C. $\frac{\text{5(x}-{\text{y)}}^{\text{2}}}{\text{x}+\text{y}}$

D. $\frac{\text{5}}{\text{x}+\text{y}}$