大全-83 求助

83.        Although it claims to delve into political issues, television can be superficial such as when each of the three major networks broadcast exactly the same statement from a political candidate.

(A) superficial such as when each of the three major networks

(B) superficial, as can sometimes occur if all of the three major networks

(C) superficial if the three major networks all

(D) superficial whenever each of the three major networks（E）

(E) superficial, as when the three major networks each

C 为什么不对,   ?    as when 怎么用. ?     each of the three...    与 three.. each 有什么不同?

查了google, 有 as when 的用法,

eg: Words as True Today as When Originally Spoken  但具体怎么用啊,  没见过. . .

E, 中each 后不用 broadcasts 么?