Kaylee has been managing projects for more than a decade and has largely used the waterfall method. She has recently taken a new job for a company that builds software for mobile devices and has begun studying the Agile method, which is largely used by this company. She begins by studying the Agile principles. What is the formalized document called that identifies 12 principles of the Agile approach?

A. Agile Principles B. Agile Charter C. Agile Manifesto D. Book of Agile