Who creates the Definition of "Done"? (Choose the best answer)
The Definition of 'Done' is a shared standard, often set by the organization, but defaults to the Scrum Team if no broader standard exists. The Scrum Guide states: 'If the Definition of Done for an increment is part of the conventions, standards, or guidelines of the development organization, all Scrum Teams must follow it as a minimum. If it is not an organizational standard, the Scrum Team must create a Definition of Done appropriate for the product.'
A: Correct---organizational standards take precedence, otherwise the Scrum Team defines it.
B: Collaboration occurs, but it's not just a 'common denominator.'
C, D: Neither the Product Owner nor Scrum Master owns it alone.
Exact Extract from Scrum Guide: 'The Definition of Done is a formal description of the state of the Increment when it meets the quality measures required for the product... If it is not an organizational standard, the Scrum Team must create a Definition of Done appropriate for the product.' (Section: 'Definition of Done')
Thus, A is correct.