Start of repeated scenarioYou are an enterprise desktop support technician for Humongous Insurance. Active Directory ConfigurationThe company has two offices named Office1 and Office2. The network contains an Active Directory forest named humongousinsurance.com. An Active Directory site exists for each office. The sites are named Site1 and Site2. Server ConfigurationAll servers run Windows Server 2008 R2 and are joined to the domain. The relevant servers are configured as shown in the following table.
The corporate security policy states that all domain controllers must have only the following roles. AD DSDNS serverDHCP server Network ConfigurationSite1 and Site2 connect to each other by using a WAN link. Client Computer ConfigurationAll client computers run Windows 7 Enterprise and are members of the domain. Some client computers are portable computers and some are desktop computers. The computers do not support hardware virtualization. All computers are configured to receive Windows Updates from WSUS1. Remote Access ConfigurationUsers can connect to NPAS1 from the Internet by using all of the VPN protocols that are supported by Windows Server 2008 R2. Fabrikam, Inc. is a customer of Humongous Insurance. Several Humongous Insurance users work at the Fabrikam office and access resources on the Humongous Insurance network by using direct VPN connections to NPAS1. Fabrikam contains several wireless access points. Application ConfigurationAll computers in the finance department run a custom application suite named App1. Several users in the sales department install an application named App2. App2 runs as a service and logs on by using the credentials of the user who installed the application. End of repeated scenario Each day, 100 users in Office2 download a 5-MB product catalog file from a share on Server1. The network administrator reports that the downloads cause an excessive load on the WAN link between Office1 and Office2. You need to recommend a solution to minimize WAN utilization. The solution must not require that additional servers be deployed. What should you recommend?

A.
BranchCache in distributed cache mode

B.
BranchCache in hosted cache mode

C.
Distributed File System Replication (DFSR)

D.
File Server Resource Management (FSRM)