The scenario describes a situation where foxes catch mice with white fur more easily than those with dark fur. This differential predation suggests that mice with dark fur are more likely to survive and reproduce since they are less visible to predators.
Based on this information, the most likely consequence is:
1. Brown fur will become predominant.
Over time, the population of mice is likely to shift towards having more brown fur, as those with this coloration have a more significant chance of surviving and reproducing. The other options do not align with the implications of natural selection presented in the scenario.