[提问］望大牛指点！！谢谢～～

mong

有一道逻辑题，我虽然可以大概选到正确的答案，但是其实我不是很懂意思，看了解答之后还是不是很明白他的逻辑线。望大牛们指点迷津，谢谢～～～

题目如下：

                   In 2001 the Peruvian government began requiring tourists tobuy expensive permits to hike the remote Inca Trail, which goes to the ancientcity of Machu Picchu. The total number of permits is strictly limited; in fact,only 500 people per day are now allowed to hike the Inca Trail, whereas before2001 daily visitors numbered in the thousands. The Peruvian government claimsthat this permit program has successfully prevented deterioration ofarchaeological treasures along the Inca Trail.

Which of the following,if true, most strengthens the argument above?

A Since 2001, touristguides along the Inca Trail have received 50% to 100% increases in take-homepay.

B Villages near MachuPicchu have experienced declines in income, as fewer tourists buy fewer craftgoods and refreshments.

C Many of the funds fromthe sale of Inca Trail permits are used to staff a museum of Incan culture inLima, Peru’s capital, and to hire guards for archaeological sites withoutpermit programs.

D Since 2001, Incanruins similar to Machu Picchu but not on the Inca Trail have disintegrated at asignificantly greater rate than those on the Inca Trail.

E The total number oftourists in Peru has risen substantially since 2001, even as the number oftourists hiking the Inca Trail has remained constant.

正确答案是D，但是我始终不是很明白，为什么E是不可以的？

我的想法：我觉得总的来p的人增加了，但是去IT的并没有，说明这个permits plan起到了preventing的作用。

如果我有什么想错，或者读题的理解问题，还望多多指点～   谢谢了～～～