Which of the following best describes the value of using a Kanban board?

A Kanban board allows your team to show others in the company what work they need subcontractors for.
A Kanban board allows the entire team to see and optimize the flow of work during the current sprint.
A Kanban board allows clients to see exactly how much time is being spent on each task.
Kanban boards are popular with the development team; however, they are not as useful to the strategist or clients.