not only are you allowed to select multiple races, it allows you to put your own race at the bottom if you choose. but what does that have to do with how we interact with eachother as black people? why do we need whites to allow us to define our race? further more, you would NOT change anything about the one drop rule even if you could.
and i qualify
whites as anyone with caucasiod features that shares predominate european ancestry. but how they define white is really up to their group, just like its up to blacks to define what's black and what isn't.