You have an Exchange Server 2010 organization.You need to ensure that a user can open a resource mailbox.What are two possible ways to achieve this goal？（）

• A、From Microsoft Office Outlook， modify the properties of the resource mailbox.
• B、From the Exchange Management Console， create a new sharing policy.
• C、From the Exchange Management Shell， set the Resource Delegates parameter for the resource mailbox.
• D、From the Active Directory Users and Computers console， reset the password for the account associated to the resource mailbox， and then provide the password to the user.