I voted for Thinks Feels and Acts like a woman because I think it is the closest fit. The other options aren't factors in identifying a woman. I can see Steph's point...How does a woman think, feel and act? And, you could also use the argument "gee...I feel like a horse today", but that is not going to make you a horse. But I think as far as gender goes (and I agree with DawnL that female is probably a more fitting term), that your feelings and thoughts
are what make you male for female. Actons, not so much so. I am female, but some mornings I get up and put on a pair of unisex shorts, a t-shirt and do absolutely nothing to feminize my appearance but that doesn't make me any closer to a male because I still identify (think and feel) like a female. Gender Identity Disorder is identifying with the opposite gender than your birth assigned gender. Thinking, actually knowing you are a female (or male in the opposite direction), feeling that you are female, then opening your eyes and looking in the mirror and seeing body parts that don't match the image in your head. That just happens to be the plumming you were given, it doesn't make you any less a female.
Also, I don't see Melissa and Kate's positions as necessarily opposite. Now I am referring to "woman" as a societal role, not gender (male/female). I believe if you do identify as a woman as Melissa said, then you will do things (this is where the 'actions' come in) that will cause society to give you the reputation that Kate refers to.
I know I am a GG, so I hope I didn't overstep my bounds, but I just thought this thread looked interesting.

Pam