#15 - Ninety percent of recent car buyers say safety was an

[Zach Foreman]

So, they could sincerely believe that safety is important to them but be mistaken, so you are correct that lying isn't necessary. But, I don't think "aware" is the problem with D. If d had said "All consumers are aware that these things are not objective sources of safety information" then I think it could be the right answer. In this case, intention is important. If they all thought they were consulting objective safety information, the argument would fail.

As for the second part, you are absolutely correct. That is the red flag. If an answer choice in a justify question could be correct but the conclusion still not correct, it is, by definition not justifying. So, you can just ask yourself "If this is true, could the conclusion be false?"