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) superficial, as when the three major networks each
请教：tongxun版主
这句中为什么说 they can ... if ...的条件从句和can 不能够搭配？ 不太理解。我谨慎地问一下：是不是all of the three major networks（后面接复数动词+the same...）和 the three major networks each（也接复数动词+the same）中间存在意思上的区别呢？
