When food is unavailable to mice that have infested a restaurant, they will ...

Mice are opportunistic feeders, and when they find themselves in a restaurant environment where food sources are limited or unavailable, their behavior typically centers around survival. If food resources are entirely depleted or inaccessible, mice may eventually face starvation. In such a scenario, they may choose to move to a different location in search of food or die if they cannot find sustenance over time. This ability to relocate in search of food sources is crucial to their survival as a species.

The idea that they might find a way to leave the restaurant or continue searching for food does play a role in their nature, but if food is consistently unavailable, they cannot sustain themselves indefinitely in one place. Hence, the most accurate conclusion in this context is that they either die or move away, reflecting their need to find a reliable food source to survive.