State the Domain of the Given Function $f(x)=9 x^{2}+9 x-9$ A) $(-\infty, \infty)$

Multiple Choice

State the domain of the given function.
- $f(x) =9 x^{2}+9 x-9$

A) $(-\infty, \infty)$
B) all real numbers except 0
C) all whole numbers
D) $(0, \infty)$