Given $f(x)=x^{2}-18 x+70$ , Find All Values For $x$ For Which $f(x) \geq 0$

Multiple Choice

Given $f(x) =x^{2}-18 x+70$ , find all values for $x$ for which $f(x) \geq 0$ .

A) $[9-\sqrt{11}, 9+\sqrt{11}]$
B) $(-\infty,-\sqrt{11}] \cup[\sqrt{11}, \infty)$
C) $(-\infty, 9-\sqrt{11}] \cup[9+\sqrt{11}, \infty)$
D) $(-\infty, 9-\sqrt{11}) \cup(9+\sqrt{11}, \infty)$