Missgiggle your colors are pretty. I think that if you use the print for A it will work, because A has some larger pieces and the print won't get too cut up. Go for this last selection. I would use the lower left for the C background color.
To All -- there seems to be a bit of confusion with the number of fabrics you are using, more than I usually use. However, pick your A B C to work with first. The rest will fall into place as we go along.