You work as a network exchange administrator at Company.com.the Company.com network currently consists of a single active directory forest containing a single domain named Company.com.during the course of the business week you receive instruction from Company.com to install microsoft exchange server 2010 on a server named -ex01 whilst ensuring that you install the prerequisites for the hub transport， client access， mailbox and unified messaging （um） server roles. What should you do？（）

• A、You should consider having the ServerManagerCmd.exe -IP Exchange-All.xml command run.
• B、You should consider having the ServerManagerCmd.exe -IP Exchange-CADB.xml command run.
• C、You should consider having the Setup.com /AnswerFile：Exchange-All.xml command run.
• D、You should consider having the Setup.com /Roles：HT,MB,UM,CA,MT command run.