In the years since the city of London imposed strict air-pollution regulations on local industry, (A)(B)
the number of bird species seen in and around London has increased dramatically. (A)(C)
Similar air-pollution rules (D)
should be imposed in other major cities.
Each of the following is an assumption made in the argument above EXCEPT:(A)
In most major cities, air-pollution problems are caused almost entirely by local industry.(B)
Air-pollution regulations on industry have a significant impact on the quality of the air.(C)
The air-pollution problems of other major cities are basically similar to those once suffered by London.(D)
An increase in the number of bird species in and around a city is desirable.(E)
The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area.
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