According to the values of Scrum, which is the best way to create Development Teams?

[answerhappygod]

According to the values of Scrum, which is the best way to create Development Teams?

A. The Product Owner will create a skills matrix according to what is needed for the project and work with the technical leads to allocate resources to the team.
B. Work with the leadership team to allocate members according to skills, seniority and experience to ensure that all Development Teams are balanced fairly.
C. Provide boundaries to the developers and allow them to self-organize into Development Teams.