A Product Owner must forecast when a set of items will be finished. Which approach is soundest?

• ADivide the remaining estimate by the average velocity to produce a completion date.
• BUse the range of throughput actually observed over recent Sprints to produce a range of dates, and report the range.
• CAsk the Developers to commit to a date they are confident about.
• DUse the best case throughput, since the team will work to the target.