You work as an Exchange Administrator for TechWorld Inc.The company has a Windows 2008 Active Directory-based contains an Exchange Server 2003 organization.The management instructs you to deploy Exchange Server 2010 ii to prepare the schema and domain first.Which of the following commands should you run prior to performing then preparation？（）

• A、Setup /PrepareAD
• B、Setup /PrepareSchema
• C、Setup/PrepareLegacyExchangePermissions：child.techworld.com
• D、Setup /PrepareLegacyExchangePermissions