Would love a feature that allows you to mark questions you already know the answer to. I've come across questions that are marked 'Fresh' on 7 Sage but were answered outside of 7 Sage (in study groups, for example).
Would love a quick checkbox or button that will either not count it in my drill analytics or allow me to refresh and get a new question.
I think D does a good job of weakening the author's conclusion (because it gives another reason besides age for the difference in survival) but doesn't indicate a misunderstanding of the research.
I think the one thing that sticks out to me with A versus D is the language. The language in A doesn't seem strong enough. I know we should avoid answers that are too strong in most cases. However, if you're trying to strengthen a claim language like "paper product may increase in volume wouldn't be that helpful.
I'm usually annoyed with the little tricks the LSAT writers pull but I chuckled at this one.
My suggestion is similar to Eric's above. Turn off BR just for questions flagged (its a new update). So in BR I still see the flag but it isn't circled unless its wrong.
If I flagged a question but was ultimately correct I still review the question to see what made me second-guess myself.