An indispensable tool for students taking courses in professional responsibility, this book contains only the essential resources: the ABA Model Rules of Professional Conduct and the official comments; a selection of the most distinctive state variations; and more than 130 original practice questions, in the format used in the Multistate Professional Responsibility Examination (MPRE), along with answers and detailed analyses. Professors and students will benefit from: The ABA Rules of Professional Conduct and the official comments, as issued through August 2022. A carefully selected compilation of variations found in state ethics codes. Each variation was chosen to demonstrate a policy choice made by a state that departed from the ABA's suggested model. The purpose is to enable students to compare certain state rules with the Model Rules and to better understand the policy choices reflected in the ABA Model Rules. More than 130 original practice questions, organized into 14 chapters, in the multiple-choice format used by the MPRE, which permits students to test their understanding of each topic studied in the course. Detailed narrative analyses of the answer to each question, explaining why one choice is correct, and why each incorrect answer is not correct.