With a medium-level rat infestation, you would not expect to see:

• A. Rats during the daytime
• B. Evidence of droppings
• C. Gnaw marks on food packaging
• D. Visible nests in the attic

Answer: (A)

In a medium-level rat infestation, it is generally less likely to see rats during the daytime because rats are primarily nocturnal creatures. They are more active at night when they feel safer and less exposed to predators or human activity. While some rats may stray out during the day when food is scarce or if their nest has been disturbed, it is unusual to observe them frequently.

On the other hand, evidence of droppings, gnaw marks on food packaging, and visible nests in the attic are all indicators of an infestation. Droppings indicate a consistent presence of the rats, as they need to excrete waste regularly. Gnaw marks suggest they are actively searching for food and can be found on various items, including packaging. Nests are also a strong indicator of an established infestation, as they provide a place for rats to breed and raise young.