OG13-22 不明白。。求各位解！

Only a reduction of 10 percent in the number of
scheduled flights using Greentown's airport will allow
the,delays that are so common there to be avoided.
Hevelia airstrip, 40 miles away, would, if upgraded
and expanded, be an attractive alternative for fully 20
percent of the passengers using Greentown airport.
Nevertheless, experts reject the claim that turning
Hevelia into a full-service airport would end the
chronic delays at Greentown.
Which of the following; if true, most helps to justify
the experts'position?
(A) Turning Hevelia into.a full-service airport would
require not only substantial construction at the
airport itself, but also the construction of new
access highways.
(B) A second largely undeveloped airstrip close to
Greentown airport would be a more attractive
alternative than Hevelia for many passengers
who now use Greentown.
(C) Hevelia airstrip lies in a relatively undeveloped
area but would, if it became a full-service
airport, be a magnet for commercialand
residential development.
(D) If an airplane has to wait to land, the extra jet
fuel required adds significantly to the airline's
costs.
(E) Several airlines use Greentown as a regional
hub, so that most flights landing at Greentown
have many passengers who then take different
flights to reach their final destinations.

答案E,我选了B

1，OA说对B说：This statement indicates that the undeveloped airstrip near Greentown might be a better wayto
alleviate flight delays at Greentown,but it tells us nothing about the effects that converting the
Hevelia airstrip to a full-service airport would have were it to be carried out.
选项说了有比B更好，但没说把H convert之后的结果。但是文章已经说了convert之后移过去20%的人原来机场就不delay了，为什么选项还要再说。。

2，OA对E说：E Correct. This statement provides support for the experts' position because it gives a reason for
thinking that the number of scheduled flights at Greentown would not be reduced, even if Hevelia
airstrip became an attractive alternative for some 20 percent of Greentown's passengers.

原文说 so that most flights landing at Green town have many passengers who then take differentflights to reach their final destinations.
我觉得这里有个many，就是说该转机的让他在老机场转，many以外不转机的让他到H去坐飞机，不是正好分流，避免delay么。。又不是所有乘客都是转机。。

求解！谢谢

PS，那如果B不对，什么样的题才应该选除他因的选项啊？？