怎么排除D呢

何小媛159753

For years the beautiful Renaissance buildings in Palitito have been damaged by exhaust from the many tour buses that come to the city.There has been little parking space, so most buses have idledat the curb during each stop on their tour, and idling produces as much exhaust as driving.The city has now provided parking that accommodates a third of the tour buses, so damage to Palitito's buildings from the buses' exhaust will diminish significantly.

Which of the following, if true, most strongly supports the argument?

(A) The exhaust from Palitito's few automobiles is not a significant threat to Palitito's buildings.

(B) Palitito's Renaissance buildings are not threatened by pollution other than engine exhaust.

(C) Tour buses typically spend less than one-quarter of the time they are in Palitito transporting passengers from one site to another.

(D) More tourists come to Palitito by tour bus than by any other single means of transportation.

(E) Some of the tour buses that are unable to find parking drive around Palitito while their passengers are visiting a site.

答案是C，我觉得CD都可加强的，该怎么排除D呢？

chasingM7

the conclusion: so damage to Palitito's buildings from the buses' exhaust will diminish significantly.
put it simply: coz of parking zone ==> exhaust decreases ==> less damage to buildings.

D) More tourists come to Palitito by tour bus than by any other single means of transportation.
this answer choice is completely irrelevant to the conclusion. it merely states a possible fact.

to support the conclusion, you need to find something, a new premise, that provides new evidence to support the conclusion - "coz of parking zone ==> exhaust decreases ==> less damage to buildings".

C) 1/4 of time travel, so 3/4 of time idling instead of PARKING.. idling is as polluting as driving. therfore, if new parking zone is available, buses will park. no exhaust during that 3/4 time.

hope it helps