Select all that apply. Before starting the first Sprint, what needs to be in place?

Select all that apply. Before starting the first Sprint, what needs to be in place?
A . Just enough Product Backlog Items with business ideas for the first Sprint
B. Completed System architecture
C. Availability of the Project Manager
D. A complete Product Backlog capturing detailed product needs
E. Staffed Scrum Team

Answer: A,E