How should the Scrum Master respond to this suggestion?

A Scrum team uses a Scrum board. They have recently introduced work-in-progress limits (WiP-limits) and blocker tickets to improve flow. The blocker tickets show on which tickets the Developers cannot currently work.

The Product Owner walks past the Scrum board and sees a blocker ticket in the ‘doing’ column with a WiP-limit of 2 He suggests that the ticket affected is moved back to the waiting to be done’ column so that another ticket can be worked on in the meantime

How should the Scrum Master respond to this suggestion?
A . Agree with the Product Owner Achieving flow in sprints was the main reason Developers chose to introduce WiP-limits and moving the ticket will improve flow
B. Agree with the Product Owner Getting work completed is more important than wasting time on an activity that has some impediment preventing it from getting to done
C. Disagree with the Product Owner Only Developers may decide to move tickets on the Scrum board, so moving the ticket will invalidate the principle of serf-managing teams
D. Disagree with the Product Owner Work on the blocker ticket is in progress and moving the ticket back artificially increases the WiP-limit to 3 and leaves the block in place

View Answer

Answer: D