Working through this book, I noticed a huge trend in many of the sections. If there is an "all of the above" or "none of the above" option listed on the multiple choice questions, chances are, that is the answer. The main theme of this books seems to be; when in doubt, choose answer "D." I did find that some of the questions were poorly written, especially in the biology section. In terms of the other sections, they are written better. Choose this book if you need a quick refresher.