Smarter Than a Door?

I have spent the past several days almost tearing my hair out. I have been trying to study for a certification exam and I was using the CD that came with the book. The questions were almost right and almost made sense with what I had been studying all semester, but not quite. Most of the time I couldn't even find the appropriated answer in the book and I did not even remember seeing any of this at all during the whole semester. I then went back and looked at the back of the book and noticed a piece of paper over another CD saying the original disk (the one I was using) was the wrong one and, oh, here is the right one hidden under this piece of paper that nobody is going to read. I pop in the correct disk and turns out I do have a clue. The other disk was for a another test in the same area, just two levels higher so that was why it was almost making sense. ARGH!

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