求救PREP逻辑20

gettoshine

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 idled at 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.
答案选C 为什么呢？C是什么意思？谢谢各位大侠了！

Provencedrea

加强扣紧元素

reasoning: 提供PARK for tour buses-(处理idling的bus)-so-   exhaust减少significantly

A 无关元素automobile

B 描述premise的某些无关背景，混淆

D仍和reasoning无关，other means不考虑

E重复PREMISE，无意义

C.exhaust:以前：至多1/4 driving  至少3/4 idling，现在IDLING的没有了~significantly减少

我不是很会表达~应该是这样~