I did not understand the language in answer choice B so I selected A...I thought it had to be missing words...

That makes two of us haha

Haven't learned advanced logic yet in the curriculum and thus did not know demorgan's laws. Should really exclude this question from the problem set.

I'm not really sure what you're asking, but "often" is the same as "many," so it falls under the category of "some." For example, I could say that "I often go to the store" if I go to the store once a week. However, someone else may not consider going to the store once a week to be "often," thus it falls under the category of some.

Doesn't AC A include the assumption that the books will deteriorate completely? It doesn't state that in the stimulus, it just says that they deteriorate, not that they deteriorate completely

I got this wrong because I thought answer choice D contained an assumption that they have used every possibility that current science allows, which it did not state in the stimulus

I originally chose B, however I felt that it was just a restatement of the 1st sentence, so I ended up selected C instead

This one seems iffy because the answer choice only says people who are politically progressive, not politically progressive feminists. That seems like we are making a big assumption that ALL politically progressive people are incapable of performing a politically conservative act...

This should be at the end of the LR section after we have learned all the question types...it's not helpful if we haven't learned all the question types, specifically Argument Part.