You have an Active Directory forest named contoso.com.You install a new Exchange Server 2010 organization that contains a Client Access server named CAS1.You need to configure certificates in the organization to support the following client connections：  （1）Autodiscover  （2）Outlook Anywhere  （3）Exchange ActiveSync  What should you do？（）

• A、Reissue a self-signed certificate to CAS1.
• B、Configure the default Web site on CAS1 to require SSL.
• C、Issue a trusted certificate that contains multiple subject alternate names.
• D、Install Active Directory Rights Management Service （AD RMS） on a member server.