Phosphate groups are polar and allow the cell to exist in water.
1. The story is talking about the dogs fur color.
2. The alleles are BB, bb, and Bb
3. The BB or black fur is dominant
I think it would be either A or B but I am not sure.... If anything I think I would go with A.
Hope this helps
<em>I think the answer is C, Hence I would pick the answer to be B because it sounds to be more information into the answer then A/B. Hope this helps, let me know if I am right. </em>