Which answer is correct?

So, I'm at Target and I bought three of those boxes of Arm & Hammer Cat Litter Deodorizers. While I was checking out, the cashier says this:

"Awww...do you have cats?"

Which is the correct response to that?

A) Umm...yes. That's what they're for.
2) No, but I find that cat litter deodorizer works just as well on my human litter box.
D) Why would you ask me that? I'm just hungry.

The correct answer, if you're me, is 2...