Problem
The back of a bag of cat litter claims, "Cats that use cat litter live three years longer than cats that don't." Do you think that cat litter actually causes an increased life expectancy for cats, or can you think of some other factors to explain this correlation? What evidence might you collect to test your explanation?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.