Which of the following should not be changed during a Sprint?

Which of the following should not be changed during a Sprint?
A . Product Backlog.
B. Definition of Done.
C. The Sprint Backlog.

Answer: B

Explanation:

The Sprint Backlog is always changing as the Sprint Backlog items are decomposed into tasks. The Product Backlog is refined during the Sprint and also may reprioritized at any time. The Definition of Done should not be changed.