(A) The first is an assessment of a phenomenon and the second is a description of specific examples of this phenomenon.
Wrong. Because the second statement is not about example. The example about the oversimplification of the media coverage is the rise of "soft news", not the support increase. The support increase itself is the result of whatever happened before that.
(B) The first is an evaluation of a general trend and the second is a reason for this trend.
The reason is stated in the second sentence of the stem.
(C) The first is a judgment of a relationship and the second is an instance in which this judgment is shown to be correct.
There is no assessment whether the judgment is correct or not in the stem.
(D) The first is a statement evaluating a phenomenon and the second is an observation of a possible result of that phenomenon.
It is correct answer. It is about the result ("may well have helped")
(E) The first is a claim about a particular issue and the second is an assessment of the accuracy of that claim.
Somewhat the same as the answer C.