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.You have received instructions from the CIO to support Autodiscover from the Internet by creating a resource record in DNS.What should you do？（）

• A、You should consider creating a Host （A） resource record.
• B、You should consider creating a Text （TXT） resource record.
• C、You should consider creating a Pointer （PTR） resource record.
• D、You should consider creating a Mail exchange （MX） resource record.