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.

正确答案：A

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 LACE w:st="on">LondonLACE>.

(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 LACE w:st="on">LondonLACE> reflect an actual increase in the number of species in the area.

我当时选了E,没有选A,请哪位解释一下本题，多谢！