Complete Solutions and Answers is a new resource created in response to customer requests. It is intended for use by teachers, graders, and homeschooling parents. It is not intended for student use. If you are buying the Introductory Physics Program, you may still want to include a copy of the Solutions Manual for your student to use without giving them the answer keys.
As the title suggests, all answer keys to chapter exercises, quizzes, tests and semester exams are included in a single book. Also, the worked-out solutions to all calculations are included.
In other words, it is the combination of the answer keys on the Digital Resources for Introductory Physics, from the back of the book, both verbal and calculation, plus the Solutions Manual. This is the reason we have made the Solutions Manual optional for the Introductory Physics Program.