Option C is to not have male-born "girls" kicking the shit out of real girls physically or even competing in sports where they would have a physical advantage, or female "trans males" on steroids competing with girls. No roids in sports, period.
"Gender-neutral" dressing rooms can be dealt with accordingly. Other spaces can be converted or an area can be designated.
Its not like there are going to be a ton of trans-identifiers in any school, so converting one bathroom, while it may be inconvenient, should suffice. We're talking numbers, here.
The real question is why aren't most of these cases being examined as mental illnesses instead of the country all pretending with them?
Yeah, its complicated. I'm not trying to oversimplify. I'm just trying to approach it in a way that doesn't require me to look at some big ass knigga in a dress and call him "her" when he clearly isn't even though that's how he may feel. There is a difference between equal rights and special rights.