Air Pollution

[neha.patni]

In the years since the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically. Similar air-pollution rules 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.


OA A

[akondakar]

I was hesitating between E and A but finally my answer is A, because the argument assumes that the presence of bird is a good indicators of the good air quality, but based on the stimulus, we can't assume that the local industry was the only cause to the air-pollution problems.

I hope it helps.