You have an Exchange Server 2010 Edge Transport server named Edge1.A partner organization has another Exchange Server 2010 Edge Transport server named Edge2.You need to encrypt all SMTP communication between Edge1 and Edge2.The solution must ensure that both servers use a trusted certificate.What should you do？（）

• A、Create a new Edge Subscription file on Edge1.Copy the file to Edge2.
• B、From Edge1 and Edge2， enable Exchange Server authentication.
• C、From Edge1 and Edge2， configure mutual Transport Layer Security （TLS）.
• D、From Edge1， run the ExportEdgeConfig.ps1 script.From Edge2， run the ImportEdgeConfig.ps1 script.