12c really doesn't matter. Just use 11g.
Coldfusion 11 can't connect to the oracle 12c container/plugin database design.
It connects to the container database all right; but not so much the plugin.
If you use an oracle database, you'll want the security features like label security.
I read somewhere that Label security only works on the plugin; not the container.
If CF11 can't connect to the12c plugin, what good is it?
Just use 11g.