The public’s welfare can be undermined by its own tastes.
Conclusion
The public's welfare can be undermined by its own tastes.
Evidence (for example ...)
Journalists, because they want to focus on stories that stimulate readers, are increasingly doing gossipy stuff rather than hard news.
Evaluate
Whenever we do Main Conclusion questions, we prime our brain to read the paragraph in that special way you read Main Conclusion and Role paragraphs -- the conclusion will probably be earlier than the support
Normally, in Logical Reasoning, the Conclusion is more likely to come at the end of the paragraph. But that tendency big time flips on Main Conclusion and Role. So you start listening as early as the very first sentence.
You have to ask yourself actively as you read each claim,
On this question, the first sentence doesn't quite sound like an opinion, but it does sound like an abstract claim, rather than a specific fact. Does the next sentence sound like it's supporting this initial claim?
Honestly, no. But if we force ourselves to look closer, there is an overlapping element. They're both talking about "the public's tastes" / "the readers' interest".
The first sentence was positing a causal connection: public's tastes --> undermines public welfare
This second sentence is talking about the public's taste, when it comes to news stories. Does it say that our taste in news stories leads to "undermining public welfare"?
Yes, aloofly. It goes on to complain that serious news stories have been displaced by TMZ and InfoWars type stories (the author is assuming that this switch in emphasis is something that undermines public welfare, but we don't need to worry about assumptions on Main Conclusion).
Incidentally the "Because" being used in the final sentence should probably be interpreted as a causal usage of Because (as in, "Because I fell down, my knee is bleeding"), not a reasoning usage of Because, as a support indicator.
Goal
Our only job is to find the Conclusion. We did. This paragraph made it particularly hard to do so. It's the first sentence. It sure makes life easier if we know the trick for Main Conclusion questions that the conclusion is earlier than the support, the vast majority of the time.
Let's find an answer that mimics the meaning of the first sentence.