B and it's really not close.
If you go with Bron as the ballhandler you might as well build with size. Also, team A has dudes who can be frustrated by defense which is automatic L.
Team C looks like they wouldn't mesh. Too much talent and ego, and a mishmash of personalities. Their inside out game would be unstoppable, but I wouldn't trust the perimeter guys to make it work as all three are volume one-on-one scorers.