Final answer:
Couple 2 (Genotypes: aabbcc and aabbcc) could have children with the widest range of skin colors.
Step-by-step explanation:
The couple that could have children with the widest range of skin colors is Couple 2 (Genotypes: aabbcc and aabbcc). This is because the genotypes of both parents in Couple 2 have the potential to produce offspring with a wider variety of skin color combinations. In Couple 1, both parents have the same genotypes, which limits the possible combinations of skin colors in their children.