The best solution for the problem of pollution by man-made technologies A. cannot involve anyone who is not a technology expert or an expert on pollution. B. can come only from efforts by experts on pollution. C. can come only from efforts by technology experts. D. is likely to come from collaborative efforts by technology experts and experts on pollution.

Why is it important for scientists to review and repeat the work of other scientists? 1.a scientific theory must be tested three times before it is proven. 2.the scientific method only applies to repeated experiments. 3.an experiment may have had errors that the scientists didn't recognize. 4.the results of individual scientists may be influenced by bias. 5.an experiment must be performed twice before the data can be analyzed.