You work as the enterprise exchange administrator at Xxx .Xxx is using Microsoft Exchange Server 2010 as their messaging solution.What actions must you take to change the Exchange-specific cost for a site link？（）

• A、You must configure the host （A） resource records.
• B、You must add and configure an IPSec Enforcement Network policy.
• C、You must create an Outlook Web App Mailbox policy.
• D、You must use the Set-ADSiteLink cmdlet.