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In the last decade, the country of Alumba has undergone a massive construction boom. In one city, Semanta, hundreds of new buildings have been erected and, as a result, the ambient light at night has increased from 0.10 lux to 10 lux, causing migratory birds flying to alter their traditional path and fly into Semanta, where they often crash into buildings. The mayor believes that to ensure the birds keep to their traditional flight path while flying through Alumba, the city should turn off lights throughout the city at night during the bird`s migratory season, so that ambient light is around 0.10 lux.

Which of the following, is necessary, to evaluate the mayor`s proposal for limiting the amount of night light that Semanta emits?
  • AThe amount of lux necessary to interfere with a bird`s navigational abilities. 分析该选项
  • BThe percent of birds flying through Alumba that are drawn to Semanta`s night light. 分析该选项
  • CWhether the period in which birds migrate is consistent each year. 分析该选项
  • DWhether there are any other migratory birds flying through Alumba. 分析该选项
  • EWhether there are any other cities in Alumba that might also emit enough ambient light to confuse migrating birds. 分析该选项
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正确答案: E

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