While Mags thinks its totally cool to just commandeer a planet, the rest of humanity is largely not really into colonization anymore and I don't think are aiming for taking a planet? Are we?? Even an empty one, like we don't know who might own that, we learned a lot form England just taking things and fucking over billions of people for centuries. Besides, getting a new planet wouldn't really solve the 'we are aware of and part of the greater universe now' problem. We'd still have that, just with a natural atmosphere, so not even a roof over our heads.
POINT is: option B.
And yes some clear leader should come out of this!....calm down Tess. Unless you can manage this plague into making the whole Sphere a dictatorship for you.