885 sec12-27,A为什么不对?

885 sec12-27

As virtually all the nation’s 50 busiest airports are, New York’s were built for an age of propellers, before jet planes weighing 800,000 pounds needed over two miles of runway.

(A) As virtually all the nation’s 50 busiest airports are

(B) As with virtually all of the nation’s 50 busiest airports

(C) Like virtually all of the nation’s 50 busiest airports

(D) Like the cities where virtually all the nation’s 50 busiest airports are（C）

(E) Like other cities where virtually all the nation’s 50 busiest airports are

A为什么不对?区别在all the nation's...和all of the nation’s 有什么区别?

As有问题。同样A的表达有问题。

all the nation's表达的是所有的国家。。。

all of the nation's表达的是国家中的所有。。。

显然这句话是后者。

时态的问题，根据逻辑意思来讲，要补也补were， 没有提示说明要用现在时啊！