Is it more attractive to have...

A. a nice bubble butt and A-cup breasts

OR

B. a nice pair of C-cup breasts and a flat butt

Depends on the man. I had a bilateral mastectomy, my husband didn't care as long as they did not remove my butt. LOL

Just up to the person looking, some men ( or ladies) prefer one or the other. For any man that likes one, another man will like the other.

It's more attractive to be a person who is so busy leading an active and productive life, questions like that never come up. THAT'S attractive.

The question alone is an immensely self-involved one. Haven't we talked about this already... many times?

A head with an active brain in it.

Depends on the guy(or girl)
I personally don't care. Either one is nice ;)

I don't even know what the difference in a-cup and c-cup is but anyhow. It all depends really. Its not we guys go looing for a cups and c cups and bubble butts. Lol. No idea ill let you know when I know my self:P