Each question in this book has a corresponding answer，a reference to a text that provides background for the answer，and a short discussion of varions issues raised by the question and its answer.A listing of references for the entire book follows the last chapter.For multiple-choice questions，the one best response to each question should be selected.For matching sets，a group of questions will be preceded by a list of lettered options.For each question in the matching set，select one lettered option that is most closely associated with the question.
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