My completely average breasts spend most of their time smashed flat in sports bras, dreaming of looking like yours. (I however, am torn, as I'd like to have the lovely large breasts but wouldn't ever want to try and run 10-25 miles with them.)
You could try swimming instead. I suspect it wasn't a coincidence that the girl on our high school swim team with enormous breasts was also the best at backstroke. If she'd been taking performance enhancement drugs she would've been booted off in the heartbeat, but built-in flotation devices weren't a problem at all.
I dance on the boundary between C and D. No photos will be forthcoming.
I am a solid B, so running is still quite comfortable. No photos of me either, unless it's from the bike leg of my last tri... which would totally defeat the purpose, as my high necked tri-top doesn't exactly scream "Look at these boobs!"
Plus, I have children. And might want to re-enter the workforce at some point.