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Question:
In the 1960s, mathematician Dietrich Braess observed that adding
a new route to a congested traffic grid can often increase drivers’
average travel times. A bottlenecking effect in adjoining streets
tends to occur as many drivers cluster together to take advantage
of the new route. This suggests that when one or more roads in a
grid are closed off, __________.
Which of the following most logically completes the passage?
A. some drivers take longer than before to reach their destinations.
B. average travel times for drivers in the grid sometimes decrease
as a result .
C. most drivers choose the road commonly regarded as the second best
alternative.
D. some drivers eventually no longer use that grid if they change
jobs and work in a different location.
E. drivers are compelled to take the roads that carry the heaviest
loads of traffic .
Answer:
翻譯 :
1960s時期，數學家誰誰觀察發現在擁堵的交通網絡上增加一條新的路線反而
會使得司機在路上的時間增加。因為很多司機為了利用新的路線而聚在一起，
這時毗鄰街道的瓶頸效應就發生了。這表明一旦關閉交通網格中一條或多條路
線，_________
下面哪個選項最能lohgically完成文章？
A. 一些司機在到達目的地之前需要花去更多的時間。
B. 在路上花去的時間也相對有所下降。
C. 大多數司機都會選擇同一條備用路線。
D. 如果司機更換的工作就再也不會使用到那套交通路線。
E. 司機們都被迫使用交通最繁忙的那些路線。
Answer: