If I was a more hardcore Lovecraft fan, I'd definitely hit B, but I'm sane, therefore A. It's nice to have company, someone you can talk to and teach things, and oral sex is always an option, because we all know what factor of the choice that picture implies.
so the reason behind this i'd assume is you'd want to populate the uninhabited island with mutant fish babies? i'll stick with A and make her go out to swim for help while i work on a tan for real ladies :P