You get a call from your friend. She recently went down into her basement, and was upset to see several glossy brown to black roaches, approximately 1 _ inches long. When she turned on the light, they ran away (they were rather sluggish) but didn't fly. She says she is used to seeing them out doors during the spring and summer, and commonly sees them near her lawn and compost pile. Now that it's winter, she is seeing them in her basement. She has only seen a few, however, and they are not in her upstairs bathroom. You know that she has a(n) cockroach infestation.