Final answer:
To create a baby with the desired characteristics, select parents with Sparkle Horn genes, white coats, black hooves, and a genetic predisposition for rainbow-colored hair.
Step-by-step explanation:
To create a baby with the desired characteristics of Sparkle Horn, white fur with black hooves, and rainbow-colored hair, you would need to select parents that have the specific genes for each trait. The correct option would be b) Select parents with Sparkle Horn genes, white coats, black hooves, and a genetic predisposition for rainbow-colored hair. By choosing parents with the specific genes for these traits, there is a higher probability of producing offspring with the desired characteristics.