You work as a network exchange administrator at Company.com.the Company.com network currently consists of a single active directory forest named Company.com which makes use of microsoft windows server 2008.The Company.com organization makes use of Microsoft exchange server 2010 as their messaging solution.The Company.com organization contains a computer named -ex01 which runs the hub transport server role.During the course of the day - ex01 fails and you delete the computer account with references of ex01 from active directory.Company.com has recently requested that you replace the hub transport server role on a new computer whilst ensuring you use the least amount of administrative effort.What should you do？（）

A.You should consider having an authoritative restore performed from Ntdsutil.you should then have a managed service account named -ex01 created.
B.You should consider having an authoritative restore performed from Ntdsutil.you should then have a cname record for -ex01 created which points to the new computer.
C.You should consider having the Setup /M：RecoverServer command run on the new computer.
D.You should consider having the Exchange Server installation program run and then select the Hub Transport role on the new computer.