You work as an Exchange Administrator for Xxx Inc.The company has a Windows 2008 Active Directorybased network.The network contains an Exchange Server 2010 organization.You need to enable automatic booking for a room mailbox called TrainingRoom.Which of the following commands will you enter in the Exchange Management Shell to accomplish the task？（）

• A、New-MailboxCalendarSettings TrainingRoom -AutomateProcessing：AutoAccept
• B、Set-MailboxCalendarSettings TrainingRoom -AutomateProcessing：AutoAccept
• C、Set-MailboxCalendarSettings TrainingRoom -AutomateProcessing：None
• D、New-Mailbox -UserPrincipalName TrainingRoom@Xxx -database "Mailbox Database" -Name"Training Room" -OrganizationalUnit Users -DisplayName "Training Room" ResetPasswordOnNextLogon $false -Room -AutomateProcessing：AutoAccept