Final answer:
American cockroaches prefer a moist environment, thriving in warm and humid conditions conducive to their lifecycle and breeding. Therefore, the correct option is c.
Step-by-step explanation:
American cockroaches prefer a moist environment. This preference for moisture is due to their need to maintain hydration and proper physiological functions. High humidity levels provide the perfect condition for cockroaches to thrive, as it supports their lifecycle and breeding capabilities. While they can be found in various parts of a building, they have a particular affinity for warm and damp areas, making environments such as basements, pipes, and sewers attractive to them. A place like attics, unless properly humid and warm, would generally not be their preferred habitat.