Hi Ron, Apologies for opening up a really old thread. I read your explanation around why D is wrong and around how "Evaluate" questions should be tackled in a way similar to how "Strengthen" and "Weaken" questions are tackled but I still have a question around the answe...

Thanks for the explanation Sage.

Looking back at the question now, i am not sure why i was trying to differentiate between total cost vs cost per unit of Uranium when the argument clearly states that extracting Uranium from seawater is currently more expensive than extracting it from mines.