I think BD are right. The SM can not say to the PO not attending Daily. If the Development team decided Peter could join because the Development team are the owner of daily

dont attend cant be told by scrum master

A and D

Obviously the correct answers.

Coaching Peter on best practices for updating the burndown chart helps ensure that the team adheres to the ideal guideline on the burndown chart, promoting accuracy in assessing team performance. Coaching the Scrum Team about the purpose of the Daily Scrum helps reinforce the importance of the Daily Scrum and guides the team in understanding and following the intended practices.

burndown charts are best practices but NOT part of scrum itself.

BD is the correct answer. Thanks

A & D are my answer

Agree on A,D. Nothing wrong or mismatch with burndown chart here

A, SM is helping with team culture B, the 2nd half answer has nothing to do with this given condition(the problem is not abt not updating the burndown correctly )

I think AD are correct. In A, the main concern is the behavior of the PO, by congratulate some specific dev team members, so it can affect the whole team mood and create tension. The PO must't influence the Dev team, as it's an autonom entity. About D, no question on this, it's correct

I concern about AD or BD too. I also did research on the Scrum Guide, and get what is defined The Guide says: "The Scrum Master enforces the rule that only Development Team members participate in the Daily Scrum." So SM can say stop attending to PO. AD is the right in scope of Scrum Guide. But, I think PO can join with the observation view.