In Disciplined Agile, limiting work-in-progress (WIP) is crucial to optimizing flow within a team. By reducing the number of tasks being worked on at any given time, teams are better able to focus on completing a smaller set of high-priority items, which reduces context switching and increases efficiency. This focus leads to faster delivery of high-quality work. Options like "A. Pursue multiple goals at a time" and "C.
Preventing priority changes" are contrary to the benefits of limiting WIP, and "D. Respect the timebox" is less relevant in the context of optimizing flow. Thus, "B. Create focus" is the correct answer.