Creating a forecast for a Sprint tends to run more smoothly when the Product Backlog items that are discussed are well understood and actionable. Which approach would you recommend to ensure this...

Creating a forecast for a Sprint tends to run more smoothly when the

Product Backlog items that are discussed are well understood and actionable. Which approach would you recommend to ensure this state of Product Backlog at Sprint Planning?(choose the best answer)A) The analysts on the Development Team document high-ordered Product Backlog items during a Sprint when they are not busy working on the forecast.B) The Product Owner works with the stakeholders to prepare Product Backlog items outside of the Sprint so the Development Team will not be disrupted.C) The Development Team uses time in each Sprint to analyze, estimate and design high-ordered  Product Backlog items.D) A separate Scrum Team of business analysts and functional testers analyze high-ordered requirements one Sprint ahead of development.