Ok, I am joking about this being the hardest LR question of all time. Of course, there have been harder questions, but for some reason, this one took me days and days to get....
First of all, this is a very unique principle question. Usually, the correct answer to a principle question is a conditional or just look likes a principle-you know, has a "should" or the equivalent of a should in there somewhere....but this problem looks more like a "find the necessary assumption question."
I get why A is the correct answer. It fills in the gap between the premise and conclusion. The premise is that certain factors can increase or undermine a witness' confidence without hurting the accuracy or reliability of identification. Then there is a big jump to a conclusion (which comes out of nowhere!) that states that thus, based on the abovementioned premise, police officers are advised to stop suspect lineups in which witnesses can hear one another identifying suspects...So the big assumption here is that the confidence of witnesses in suspect lineups is affected by hearing other witnesses identifying suspects, and that's how A connects the premise to the conclusion.
But the thing which took me so long to get was, why would this matter?!?! Why would police officers disallow suspect lineups in which witnesses can hear one another identifying suspects because it might affect their confidence levels, if their level of confidence has no effect on the reliability of their accuracy?
So I talked to my dad about it, who is in the military and thinks more like a cop, and he said that if a witness' confidence is lowered, they might not be as forthcoming about what they think, and they might be less willing to cooperate.
What do you guys think?
Of course price is not an indication of value! 7sage is valuable...and it's relatively cheap! AND I got away with it..