I like B. The "safe" side of the pin is closer to the water, and if you go left of the pin you end up in a bunker or down in that little chipping area, it looks like. Basically, it seems to me that if the water isn't there, the right play would be to aim a little right of the B pin to avoid that swale. Since the water is there, I'd think they'll say "eff it, I don't want to be in the water or the swale, so I'm firing right at the flag," which can lead to some really great shots and birdie chances.
One question: I heard them say it was "not a long par 3" a couple of times, but never heard them say what the actual distance was. Anybody?
One more: I wonder if those are the exact 4 positions they'll use for each day and we're just picking which one they'll use on Sunday. or if they have other choices already planned out for the other days?