What are relevant boundaries that promote self-management according to the Scrum framework? (choose all that apply)

What are relevant boundaries that promote self-management according to the Scrum framework? (choose all that apply)
A . Time-boxing all effort to allow regularly checking the validity of any chosen path and thus limit the risk of going off-track. I know time boxing events definitely help teams fulfilling the Sprint goals they committed to during the sprint planning.
B. The clear definition of sub-responsibilities and hand-overs within the Scrum Team.
C. Having an even number of members in a Scrum Team in order to be able to do pair programming and be more productive.
D. Creating an integrated usable Increment by the end of each Sprint.

Answer: A,D

Explanation:

Scrum Guide:

Commitment: Sprint Goal

The Sprint Goal is the single objective for the Sprint. Although the Sprint Goal is a commitment by the Developers, it provides flexibility in terms of the exact work needed to achieve it. The Sprint Goal also creates coherence and focus, encouraging the Scrum Team to work together rather than on separate initiatives.

The Sprint Goal is created during the Sprint Planning event and then added to the Sprint Backlog. As the Developers work during the Sprint, they keep the Sprint Goal in mind. If the work turns out to be different than they expected, they collaborate with the Product Owner to negotiate the scope of the Sprint Backlog within the Sprint without affecting the Sprint Goal.

An Increment is a concrete stepping stone toward the Product Goal. Each Increment is additive to all prior Increments and thoroughly verified, ensuring that all Increments work together. In order to provide value, the Increment must be usable.