why not E?
Here's why E is an assupmtion of the argument. We're looking for a statement that is not an assumption in this question.
(B) Air-pollution regulations on industry have a significant impact on the quality of the air.
- This statement is nescessary to support the argument that air pollution regulations are effective
(C) The air-pollution problems of other major cities are basically similar to those once suffered by London.
- THis statement is needed to support the plan to implement the same regulations in other parts of the world
(D) An increase in the number of bird species in and around a city is desirable.
- This statement is needed to support that the air pollution measures put in place to increase the number of bird species 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.
- This statement is needed to support the author's comment that the number of species has increased
In fact, A is the only one that does not have any real use to the argument.
(A) In most major cities, air-pollution problems are caused almost entirely by local industry.
- With this statement, nothing in the argument is supported for.