Your company has an Active Directory Domain Services (AD DS) domain. You have a main office and a branc h office that are connected by a slow WAN link. A file server that runs Windows Server 2008 R2 is located in the branch office. All other servers are located in the main office. You virtualize an application by using Microsoft Application Virtualization (A pp - V) 4.5. The available bandwidth is not sufficient for branch office users to run the virtualized application. You need to ensure that branch office users can run the virtualized application by using the Microsoft Application Virtualization Desktop Clien t. What should you do?（）

A. On each App - V server in the main office, upgrade the App - V desktop clients to 4.6.
B. On each client computer in the branch office, upgrade the App - V desktop clients to 4.6.
C. On the file server in the branch office, install the Rem ote Differential Compression feature.
D. In the Microsoft System Center Application Virtualization Management Server, configure an Application Virtualization file server for the branch office.