C - Self is is any man claiming to be woman.
(Do you ever stop and think how ridiculous that really is, that claiming to 've something would make it so, I'm no other area of life is this taken as red?)
@Stillscreaming
You use of the word "pretending" suggest you think they know they are faking it. I'd say some do know, some genuinely think being a woman is something 'up for grabs'.
It is not. A woman is an adult human female. Not a category you can randomly opt into.
Trans women with a GRC are included in the category 'women' for their benefit and they do not generally disadvantage women (some do, many, I am sure, do not).
But transexual women are an exception to a general biological (and currently social) rule.
"Many people are uncomfortable with the thought of C. I'm trying to work out if B. is an issue and, if so, for whom?"
I think B is only an issue in a small number of areas. Not relayed to the excellent posters here. I Don't want to go round on circles with you but am happy to say what I think of you want.