Question ID:PT7 S1 Q21 Passage:The initial causes of serious accidents at nuclear power plants have not so far been flaws in the advanced-technology portion of the plants. Rather, the initial causes have been attributed to human error, as when a worker at the Browns Mills reactor in the United States dropped a candle and started a fire, or to flaws in the plumbing, exemplified in a recent incident in Japan. Such everyday events cannot be thought unlikely to occur over the long run. Stem:Which one of the following is most strongly supported by the statements above? Correct Answer Choice:BChoice A:Now that nuclear power generation has become a part of everyday life, an ever-increasing yearly incidence of serious accidents at the plants can be expected. Choice B:If nuclear power plants continue in operation, a serious accident at such a plant is not improbable. Choice C:The likelihood of human error at the operating consoles of nuclear power generators cannot be lessened by thoughtful design of dials, switches, and displays. Choice D:The design of nuclear power plants attempts to compensate for possible failures of the materials used in their construction. Choice E:No serious accident will be caused in the future by some flaw in the advanced-technology portion of a nuclear power plant.