Option D: reject society's model and find your own path
Us Queers have been doing this since, well, ever. Even in places and times were people were not open about sexuality, we still found each other and had long lasting relationships. Since we were already working outside of the societal norm, this made other options even easier. I generally find that LGBT+ folk are more openly into kink, and polyamorous relationships are fairly common, in a number of different forms.
Just like in startups, constraints on relationships are a blessing, not a curse. The difficulties and differences are not what will make relationships work, but what in fact will ultimately make them /work/.