You work as the enterprise exchange administrator at TestKing.com. TestKing.com makes use of Microsoft Exchange Server messaging solution. The TestKing.com network consists of a single ActiveDirectory domain named testking.com. The TestKing.com network contains two subnets， SubnetA and SubnetB， which is separated by a firewall.SubnetA is configured to host the servers and SubnetB the user workstations. Halft the user workstations make use of Outlook Anywhere to connect and the other half MAPI. During thecourse of the day you receive an instruction from the CIO to install the following Exchange Server 2010servers as follows： * TESTKING-EX11 with a Mailbox role * TESTKING-EX12 with a Hub Transport role. * TESTKING-EX13 with a Client Access role. To ensure productivity you need to ensure that Testking.com users utilizes Microsoft Office Outlook toaccess their public folders and mailboxes. What should you do？（）

A. You should consider using TCP ports 80 and 443 from the client subnet to TESTKING-EX13 You should also open TCP port 1024 to 65535 from the client subnet to TESTKING-EX11.
B. You should consider using TCP ports 80， 135 and 1024 to 65535 from the client subnet to TESTKING-EX11.You should also open TCP port 25 to TESTKING-EX12.
C. You should consider using TCP ports 441， 135， and 1024 to 65535 from the client subnet to TESTKING-EX11.You should also open TCP port 135 and 1024 to 65535 from the subnet to TESTKING-EX13.
D. You should consider using TCP ports 80， 443， 135 and 1024 to 65535 from the client subnet to TESTKING-EX13.You should also open TCP port 25 to TESTKING-EX13.