You work as the enterprise exchange administrator at Xxx .The Xxx network consists of a domain named xxx .Xxx has an Exchange Server 2010 server named XXX-EX01 that has the Hub Transport server role installed.What actions must you take to allow XXX-EX01 to receive e-mail from the Internet？（）

• A、You must change the properties of the MSExchangePOP3 （TCP-in） Windows Firewall rule.
• B、You must create and export a filter from the Exchange Management Console.
• C、You must select the Anonymous user’s permission group for the Default XXX-EX01 Receive connector.
• D、You must configure Outlook Anywhere.