Hey Metallica,
Yes, I do agree - a few things that I think make this a pretty good GMAT-worthy question (not to say that others on here aren't! I think there are a ton of great questions to study from on here, obviously) are:
-The use of the tricky-plural word "apparatus"...it makes most of us feel uncomfortable, but it's not a decision point here so it doesn't even have a chance to matter. But its awkward presence makes the sentence not "sound right" in any form, making decisions tougher.
-The singular/plural Pronoun decision point in A, B, and C helps to eliminate C, but D and E don't use a pronoun...in this way, they can "throw you off the scent" of what's really important here. Most GMAT questions will involve more than one decision.
This one definitely has that feel to it that you won't be fully satisfied with the correct answer in that "that's exactly how I would have written it!" way, but systematic analysis of the question should lead you to the right answer, regardless.