Write the Domain of the Function R(x) as a Union $r(x)=\frac{5 x^{7}-6 x^{5}-3}{x^{2}-5}$

Write the domain of the function r(x) as a union of intervals.
$r(x) =\frac{5 x^{7}-6 x^{5}-3}{x^{2}-5}$

A) $(-\infty,-\sqrt{5}) \cup(\sqrt{5}, \infty)$
B) $(-\infty,-\sqrt{5}) \cup(-\sqrt{5}, \sqrt{5})$
C) $(-\sqrt{5}, \sqrt{5})$
D) $(-\infty,-\sqrt{5}) \cup(-\sqrt{5}, \sqrt{5}) \cup(\sqrt{5}, \infty)$