The correct answer is A - Self-organize. One of the fundamental principles of agile is that teams are self- organizing and cross-functional. During iteration planning, once the stories are accepted into the sprint, the team collaborates to break down those stories into tasks and assign work among themselves based on skills and interest.
From the PMI Agile Practice Guide:
"Agile teams are self-organizing, meaning they collectively decide how to accomplish their work, rather than being directed by others. This principle supports autonomy and trust, and enhances team ownership and commitment." (PMI Agile Practice Guide, Section 4.3 - Team Performance) Mike Griffiths reinforces:
"Agile teams are trusted to manage themselves. Once user stories are selected during iteration planning, the team decomposes stories into tasks and self-assigns work collaboratively." (Mike Griffiths, PMI-ACP Exam Prep, Chapter 4 - Team Performance) Incorrect options:
* B contradicts agile principles of self-assignment and voluntary collaboration.
* C may be valuable for clarification but is not the first action after stories are added.
* D identifying the Scrum Master is irrelevant to the task breakdown phase.