You forgot:

C. "Oh my God, why are you so mean to me! That really hurt!" *cries*
D. "Jeez, stop being so sensitive."

I was not involved in the exchange. The response was B, which I feel was highly inappropriate. I summarized the exchange below.

E. I'm sorry I fucked you.

I'm going to guess you got B.

A lot of it has to do with whether the offender and offendee can agree that the offendee has a legitimate right to feel offended, though. Obviously the offendee believes they do, but it's a foregone conclusion that sometimes people get offended without having a good reason for it. That doesn't mean you tell them to go fuck themselves, but I have difficulty apologizing when I really don't feel I actually did something wrong, either. Witness my most recent dramaz, where my ability to apologize is somewhat inhibited by the fact that the other party sat on the things she was feeling offended about for -months- and I lack specifics. I'm not keen on blanket apologies because I can't assess whether they're actually deserved.
Put another way, to some degree there's a statute of limitations on these sorts of things.

Edited at 2012-05-09 06:04 pm (UTC)

Personally I'm really sick of the notion that calling someone on their rude and offensive behavior is ruder and more offensive than the original rude and offensive behavior. Guess what? No, it's not.

I've encountered B far too often, and in one case, it was promptly followed up with a tirade of "Don't try to change me!"

I default to A, because I'm a nice guy. :)