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
我选的是C。句意是如果三个主要的电台都播放同一个后选人的演说，那么电视就可以说是superficial的。
C:1,if条件句不是举例,改变了原意：说如果不是在the three major networks all时，television不 一 定是肤浅的。
2,这里的all,each作同位语这里的意思上有细微的差别，all所强调的是the three major networks 作为一个整体
each强调的是三个中的每个个体。
感谢JERJER！
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