Answer
$C$
Work Step by Step
$C$ does not have a horizontal asymptote because $f(x)=\frac{x^2-9}{x+3}=x-3,\ (x\ne-3)$ and it has a hole at $(-3,-5)$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.