What two components should you include in the recommendation?

Your company has a main office and a branch office. The branch office connects to the main office by using a VPN over DSL connection.
The branch office contains 500 client computers that run Windows 8.1. All the computers are on the same subnet.
You plan to upgrade the operating system on the computers by using Configuration Manager. During the upgrade process, you will maintain the user state and the files.
You need to recommend a solution to reduce the amount of WAN traffic during the operating system deployments.
What two components should you include in the recommendation? Each correct answer presents part of the solution.
A. a cloud management gateway
B. a distribution point
C. a cloud-based distribution point
D. a fallback status point
E. a management point
F. a state migration point