The domain of function f is (- ♾️ , ♾️) the value approaches - ♾️ as x approaches - ♾️ and the value of the function approaches ♾️ as x approaches ♾️. Which function could be function f?

A. f(x)=x^2-36/x-6
B. f(x)=x-6/x^2-36
C. f(x)=x+6/x-6
D. f(x)=x-6/x+6