You are the administrator of an Exchange Server 2003 organization named contoso.com.
You need to deploy Exchange Server 2010 Service Pack 1 (SP1) to the network.
What should you do first?

A.
From the Exchange Server 2010 installation directory, run setup
/preparelegacyexchangepermissions.

B.
Add the computer accounts of the Exchange Server 2003 servers to the Organization
Management universal security group.

C.
Add the computer accounts of the Exchange Server 2003 servers to the Delegated Setup
universal security group.

D.
Add the computer accounts of the Exchange Server 2003 servers to the Exchange
Trusted Subsystem universal security group.