What are the two primary ways a Scrum Master helps a Scrum T...

What are the two primary ways a Scrum Master helps a Scrum Team work at its highest level of productivity? (choose the best two answers) A. By ensuring the meetings start and end at the proper time. B. By keeping high value features high in the Product Backlog. C. By facilitating Scrum Team decisions. D. By removing impediments that hinder the Scrum Team.