sorry guys I still don't get it.
the way i see it is there is a big group PC and there is a subgroup FI. so if NO ONE in the group (PC) lives in suburbs how can a some people of that subgroup LS? shouldn't it be that no FI - LS?

Hi, can you please explain why A is right? I mean I get that it logically works, but don't we have support for B in lines 14-15?
Thanks