The EPA is considering whether XYZ solution should be placed on the list of toxic chemicals. XYZ is used in hospital surgical wards to clean surgical instruments, equipment, and furniture. The substance is very effective and is the least expensive substance of its kind on the market. Humans who have prolonged exposure to XYZ may contract forms of cancer, although no study on the subject has been termed definitive. Under the Toxic Substances Control Act, what factors should the EPA consider in making this determination?