You work as th

You work as the enterprise exchange administrator at Company.com.The Company.com network consists of a single Active Directory domain named Company.com.Company.com has an Exchange Server 2010 organization.Company.com is has Federated Sharing enabled.You have received instructions from the CIO to store the Application Identifier （AppID） of the domain for the federated trust by setting up a DNS record.What should you do？（）

• A、The best option is to use an A record.
• B、The best option is to use a CNAME record.
• C、The best option is to use a TXT record.
• D、The best option is to use a SRV record.