Your network contains an Active Directory domain named contoso.com.   The network has a branch office site that contains a read-only domain controller （RODC） named  RODC1. RODC1 runs Windows Server 2008 R2.     A user named User1 logs on to a computer in the branch office site. You discover that the  password of User1 is not stored on RODC1.     You need to ensure that User1’s password is stored on RODC1.     What should you modify（）

• A、the Member Of properties of RODC1
• B、the Member Of properties of User1
• C、the Security properties of RODC1
• D、the Security properties of User1