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？（）
- AFrom Microsoft Office Outlook， modify the properties of the resource mailbox.
- BFrom the Exchange Management Console， create a new sharing policy.
- CFrom the Exchange Management Shell， set the Resource Delegates parameter for the resource mailbox.
- DFrom 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.