Scientists have genetically-engineered some strains of bacteria to consume toxins, such as oil, and to excrete the toxins as harmless substances. How might these bacteria most likely impact society? A. They will cause more bacterial infections in people. B. They will grow out of control and consume the world's oil supply. C. They will cause people to become more careless about polluting the environment. D. They will enable people to easily clean up spilled pollutants in the environment.