Yeah this question was a tricky one and one I got wrong because I just breezed through the answers thinking A was right. Funny thing too is that I had like 4-5 mins remaining when I was finished with all the questions and yet this was the only one I got wrong in the section.
Analyzing it, I chose A initially, re-picked one and chose B again, until finally I chose choice E. I found out that while all the choices have similar structures with regard to the conclusion, the real kicker here is the similarity between the stimulus's premise and the answer choice's premise. The only answer choice that has a premise along the structure or reasoning of "The reasoning is inadequate because Choice X is better than Choice Y at getting job Z done" is E. Pretty much all the other choices fail to make this comparison.
Hope my post wasn't redundant upon what the earlier poster posted but I spent a long time analyzing this problem and why I got it wrong.