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

my explanations:

About A: First of all, each, if it's a pronoun (as it is in A), is singular. In fact, each is almost always singular, but there's at least one exception, which we will see in just a minute. So, A can be faulted for using a plural verb, broadcast, with a singular subject, each. What I really like about A is that it uses such as, which we use to give examples. All the other incorrect answer choices use words that mean something different from for example.

About B: : B is not only awkward, it also incorrectly uses if in the subordinate clause connected with can in the main clause. I think this is the part that is confusing people, so let's flip the sentence around to see a bit more clearly that it's not correct to use if with can: If all of the three major networks broadcast the same statement, television can be superficial.

About E: : I think it is right answer because maintains the same meaning as A, and corrects the subject/verb agreement problem. .

BUT.. Still 1 doubt in my mind is : we are saying => superficial, as when the three major networks each, so with each (singular), can we consider broadcasts (singular), not broadcast(plular) ?

please help me to understand this doubt.

~ Sarwan