Queenbarbie,
I like both your "B's". I lean towards the pink/salmon one as the greens and blues are all from the same side of the colour wheel. But that is a personal preference thing.
Check out Karen Brown of Just Get it Done Quilts' Colour Theory videos.
https://www.youtube.com/watch?v=DxxKfjfNtq4
I like the C and D in the bottom photo, there is more contrast between them. Have you tried to take a black and white photo of them to double check the contrast?