Which tool will help the team most?

A team has problems keeping track of the work they do The Product Owner has no idea what work the team is currently doing The Scrum Master thinks the team needs more transparency to see who is working on what The customer would like an estimation of the team’s velocity In addition the team wants to improve the flow of the work and identify constraints

Which tool will help the team most?
A . A burn-down or a burn-up chart that tracks the work-in-progress (WiP) and the teams velocity
B. A Kanban board or Scrum board with work-in-progress limits (WiP-limits) and blocker tickets
C. A visualization of the product backlog or the sprint backlog with a way to pull work into a sprint

Answer: B